With bitcoin, you make your own change within the transaction.
At first I thought about it being something normal, but the amount of people complaining about a similar real bug on the internet made me freak out a bit. However, I kept googling until I came across some comment that explained that this is the normal behavior when you send a part of a bitcoin, but being the newbie that I am, it was when I saw your comment that I really calmed down. Thanks.
Anyway, I learned something that I like to share, which is that there is an actual bug with MultiBit that causes balance to transform into unconfirmed bitcoins, and the devs apparently aren't taking it seriously:
https://github.com/keepkey/multibit-hd/issues/862
I think it would only be reasonable to consider moving to other solutions until this bug gets dealt with and fixed.