A conflicting transaction has been detected in our memory pool. The transaction hash displayed below may change
There has been some malleability attacks recently - third party duplicating the transactions.

See https://en.bitcoin.it/wiki/Transaction_Malleability for details on the attack technique.

The attack is merely an annoyance as far as I've understood, and there is a BIP in the making (BIP 62) to deal with this attack vector.

Perhaps this explains your problems.