Tables were always a "troubled" topic here.
And, as I also answered in the contest's topic too, the easiest approach/fix is to make a first row of underscores in order to offer enough spacing.
Now I'll write here the code too (I've also fixed some extra table tags which seemed to be there by mistake) :
[color=orange][b][size=16pt]Contestants Gallery of XMAS Decoration Lealana Contest 1[/size][/b][/color]
[table][tr]
[td]__________________________________[/td][td]__________________________________[/td][td]__________________________________[/td][td]__________________________________[/td][td]__________________________________[/td][/tr][tr]
[td][center][img width=200]https://i.imgur.com/4z56O40.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61364458#msg61364458]1) montreal1[/url][/center][/td]
[td][center][img width=200]https://i.ibb.co/F69YDcR/IMG-4635.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61383195#msg61383195]2) MoparMiningLLC[/url][/center][/td]
[td][center][img width=200]https://iili.io/HoqqMYX.md.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61434118#msg61434118]3) Dr.Bitcoin_Strange[/url][/center][/td]
[td][center][img width=200]https://i.imgur.com/ABOl0kv.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61462022#msg61462022]4) minerjones[/url][/center][/td]
[td][center][img width=200]https://i.ibb.co/K6J7v0B/BB62-BDD8-E7-FC-4-ACC-B5-D1-F0-CEDD4-DF1-DA.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61488985#msg61488985]5) TxCryptoKid[/url][/center][/td][/tr]
[tr]
[td][center][img width=200]https://i.postimg.cc/rydCgKs9/3-ED87-B3-F-4943-432-E-B78-F-562-CE0542808.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61489420#msg61489420]6) saxoshi[/url][/center][/td]
[td][center][img width=200]https://i.postimg.cc/TP20qxKM/8821387656958368210.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61489534#msg61489534]7) MarkZellers[/url][/center][/td]
[td][center][img width=200]https://i.imgur.com/J7VCiUB.png[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61493405#msg61493405]8 ) Kryptowerk[/url][/center][/td]
[td][center][img width=200]https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhHvS3PC4x2SPg_cxnOPtnUlKMdu1Wrf2rXc7lextH6vwSNWJMwHM2EPWyJ88ArUe-k9ZXpdI2DR6BaEmHy0od4PQuNQ4e8MAzN-rxmwCPEnLK76aaSKlA3OkdmYNdLSwsQ4sQqjK9RaA_QvGULxvKpUc-UoA3P0zoVpZX3dpDmi92XXHyZTawWTG46/s16000/BTC%20Decoration%20contest%201.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61494466#msg61494466]9) aoluain[/url][/center][/td]
[td][center][img width=200]https://i.imgur.com/ispwSrjl.png[/img]
[url=https://youtu.be/fs0Wb5OzUZA]10) cryptogreatdane[/url][/center][/td][/tr]
[/table]
[color=orange][b][size=16pt]Contestants Gallery of XMAS Decoration General Contest 2[/size][/b][/color]
[table][tr]
[td]__________________________________[/td][td]__________________________________[/td][td]__________________________________[/td][td]__________________________________[/td][td]__________________________________[/td][/tr][tr]
[td][center][img width=200]https://i.imgur.com/vBDBhO9.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61364458#msg61364458]1) Shaha98[/url][/center][/td]
[td][center][img width=200]https://i.imgur.com/QQL3NMR.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61365444#msg61365444]2) Dubaian[/url][/center][/td]
[td][center][img width=200]https://i.imgur.com/pfbdmRd.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61377581#msg61377581]3) Cygan[/url][/center][/td]
[td][center][img width=200]https://i.ibb.co/L16MDfq/photo-2022-12-02-23-56-04.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61383255#msg61383255]4) Tjtonmoy[/url][/center][/td]
[td][center][img width=200]https://iili.io/HoqKByb.md.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61434118#msg61434118]5) Dr.Bitcoin_Strange[/url][/center][/td][/tr]
[tr]
[td][center][img width=200]https://i.imgur.com/BPXmGEC.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61457283#msg61457283]6) Mbitr[/url][/center][/td]
[td][center][img width=200]https://i.postimg.cc/fTwXQKW3/Snowglobe1.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61483590#msg61483590]7) xSlyy[/url][/center][/td]
[td][center][img width=200]https://i.ibb.co/CWnbrkG/bitcoin.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61486357#msg61486357]8 ) Burugcrypto[/url][/center][/td]
[td][center][img width=200]https://i.ibb.co/vsswGCb/Bitcointalk-Christmas22-1-OK.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61488282#msg61488282]9) Remsjack[/url][/center][/td]
[td][center][img width=200]https://i.ibb.co/5B6Bnw4/6-AC2-F6-B1-E2-F5-4-ECC-B7-B9-02189-DB0-E26-E.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61488985#msg61488985]10) TxCryptoKid[/url][/center][/td][/tr]
[tr][td][center][img width=200]https://i.postimg.cc/755H9sfh/received-5832104403526105.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61490039#msg61490039]11) Woodrose[/url][/center][/td]
[td][center][img width=200]https://i.ibb.co/9hb72mV/IMG-20221224-WA0029.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61492021#msg61492021]12) Amphenomenon[/url][/center][/td]
[td][center][img width=200]https://i.imgur.com/CeGhvQu.jpg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61492262#msg61492262]13) Patrol69[/url][/center][/td]
[td][center][img width=200]https://i.imgur.com/6oetKZS.png[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61493405#msg61493405]14) Kryptowerk[/url][/center][/td]
[td][center][img width=200]https://lh3.googleusercontent.com/-Ss-pwd03_fg/Y6h5qh6O9EI/AAAAAAAABQ0/5f-8jU5kWQwjZQhvwxlPkd4tquV8yhVxgCNcBGAsYHQ/s1600/1671985577214302-0.png[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61494466#msg61494466]15) aoluain[/url][/center][/td][/tr]
[tr]
[td][center][img width=200]https://imgvb.com/images/2022/12/25/18240c6802c943a9c138c401a856fbca.png[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61494753#msg61494753]16) Helena Yu[/url][/center][/td]
[td][center][img width=200]https://i.imgur.com/qeRHNY8.jpeg[/img]
[url=https://bitcointalk.org/index.php?topic=5423870.msg61495391#msg61495391]17) Ryu_Ar1[/url][/center][/td]
[/tr]
[/table]