My bitcoin-qt and blockchain.info wallet are the same ( it was imported via the wallet.dat file ). Will deleting the blockchain.info wallet delete the BTC on it ? It gives me this warning, but I think it only applies to the wallets opened from there ? I don't want to delete my blockchain account and see the funds gone for good even on my bitcoin-qt.
bitcoin addresses and private keys can exist many places at the same time. If similar copies are stored on computer A and B, deleting everything from computer B will have the effect that computer A still lets you have access to everything, while you lose access on computer B. So if you have coins in an online service, and you have copies somewhere else, then deleting it from the online service will make it be deleted from there, but remain your personal copies. However to be sure, I would definately move the coins to an address only you have the private keys for.