I agree that the wood may just need to acclimate itself to it's new atmosphere.
But sending an email and/or making a phone call to Billiard Warehouse is a good idea as well. If for some reason your cue doesn't 'straighten up', at least the paperwork/claim form process is started.
Send an email, and ask them what they would like you to do at this point. This way, if there is a problem down the road, it doesn't appear that you're trying to put one over on them.
Good luck, hope it all works out for you.