I don't want to spread FUD, but I think you got scamed.
That there are 2 contracts for the same token is not normal but in same cases there exists some more, like NIO.
I think the case why there are 2 different contracts out there is the token supply.
"Real" LNK
https://etherscan.io/token/0xe2e6d4be086c6938b53b22144855eef674281639 --> Supply 47,503.2535 LNK
"depricated" LNK
https://etherscan.io/token/0x8cFaf62D0203AE2cc52CBafA3E1A4bdef8bf1A60 --> Supply 60,000 LNK
It seems to me that they burned some of their tokens or didn't even created them.
Normaly when sth like that happen, everyone holding the depricated tokens will receive the new ones as well
Now it seems to me, that killerjoegreece sold you some worthless depricated LNK tokens
You really should contact him. I think the LNK team can't help you about that, but you can try.
I keep my fingers crossed for you