I don't understand well what's done:
Had a question removed, it had a vote balance level of 0
(guess 0+ and 0-)
and I see that:
that's why I'm a bit confused, if it had 1+, 1-, then it would have been -3 not -2
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You get +2 for accepting an answer on a question, as well as for having a suggested edit accepted. When a post has been deleted you lose those points again.
As you point out in the comments, the other question was merged, forcing an automatic un-accept, leading to the same point loss.