I'd aggresivley go for an answer if Chris aint around, I'd make some calls or maybe poolspaforum.com can help? (it's kinda of slow over there and I don't know the qualilty of the advice, fwiw).
I would be very concerend about streatching our the liner if it's in there half a$$ed and has a few tons of water pulling on it. Once it's properly re-seated it might never look right.
I would also be concerned about water behind the liner and wall. (Corrosion of the steel wall, damage to any foam?, and water erosion around footings. Plus, if it's not seated right, it may start to pull out further and further.