You were in too much of a hurry . All these posts are from this morning. POP (pool owner patience) is a key ingredient of pool care. If the other side is truely wrecked, I'm not sure I can help you now. (but if there's still hope I offer the following) :
Put the 'free' rail back in the cup (if it isn't already) and pull it up ~ 1", now try working the other circularly while pulling up on it, it should eventually raise some (once you've gotten it to come up, the problem's all but solved). Work the 2 rails so that you can get the 'stuck' one up a little more each time (IF THIS IS A LINER POOL - MAKE SURE THAT THE "BUMPERS" DON'T BECOME DISLODGED!! as this could lead to a tear in the liner!!!!!!!!!) What probably happened is that the anchor cup wasn't put in 'level' with the deck, find out which side it's being 'pinched' on and apply force in the opposite direction while lifting, it's a slow proccess but will allow you to get the *%#@#^(() thing out As this dependent on your being able to still remove it, I have a question:
Do you have a SWCG?
I wish you well with this problem, if I can be of any assistance, feel free to call upon me (I have to 'talk' stubborn rails out of the deck almost every day at this time of the year).