This is the malleability problem: someone is creating copies of transactions that result in the same result but look different to the network (different transaction id).
In your screenshot, you see that both transactions are "doing" the same thing. They are basically the same tx under a different name.
As long as one of the two confirms, you're good. You can ignore the one that does not confirm.

And no, bitcoins aren't deducted twice, don't worry. Only confirmed ones count towards your balance.
Note that your wallet software might be confused and thus show an incorrect balance until the unconfirmed tx is discarded.