It's unstable and seem that had controlled from another pool or hacker:
04:24:48: WTHC 1011285 - diff 1141.982899911 job 3a77 to 4/4/4 clients, hash 307632.880/163492.640 in 0.1 ms
04:25:05: *** ACCEPTED Withcoin 1011285 (diff 2533.44) by XXXXXXX (id: 5)
04:25:05: *** CONFIRMED 1011285 : 000000000019de33c52b7b2d821c706bbb4b654cdb64d8234d31bc2bb9560614
04:25:05: WTHC 1011286 - diff 1684.892994098 job 3a78 to 4/4/4 clients, hash 388272.880/241218.677 in 0.0 ms
04:25:10: WTHC 1011287 - diff 916.641893648 job 3a79 to 4/4/4 clients, hash 318682.304/131231.565 in 0.1 ms
04:25:14: WTHC 1011288 - diff 1330.609603534 job 3a7a to 4/4/4 clients, hash 334810.304/190497.491 in 0.1 ms
04:25:19: WTHC 1011289 - diff 770.127783170 job 3a7b to 4/4/4 clients, hash 340186.304/110255.788 in 0.1 ms
04:25:20: *** REJECTED
Withcoin block 1011289 1 txs
04:25:35: *** REJECTED
Withcoin block 1011291 1 txs
04:25:41: WTHC 1011292 - diff 1560.484702358 job 3a7e to 4/4/4 clients, hash 337736.243/223407.692 in 0.1 ms
04:25:44: WTHC 1011293 - diff 2177.420901285 job 3a7f to 4/4/4 clients, hash 353864.243/280662.347 in 0.1 ms
04:25:45: WTHC 1011294 - diff 3186.471660527 job 3a80 to 4/4/4 clients, hash 353864.243/280662.347 in 0.0 ms
04:25:49: *** REJECTED
Withcoin block 1011294 1 txs
04:27:18: *** REJECTED
Withcoin block 1011301 1 txs
04:27:22: WTHC 1011302 - diff 3739.806082918 job 3a88 to 4/4/4 clients, hash 309106.604/0.000 in 0.1 ms
04:27:29: WTHC 1011303 - diff 2150.687664936 job 3a89 to 4/4/4 clients, hash 330610.604/0.000 in 0.1 ms
04:27:33: WTHC 1011304 - diff 2150.687664936 job 3a8a to 4/4/4 clients, hash 273090.083/307904.439 in 0.1 ms
04:27:40: *** REJECTED
Withcoin block 1011304 1 txs
04:27:43: *** REJECTED
Withcoin block 1011304 1 txs
You may get some accepted block but just a little, after that it reject all
I found the pool three minutes fast.
This shows that it was created first.
It is seen as a network problem.
Add the node.