Battery Issue

hello.

I recently got a Macbook Pro. I went to calibrate the battery today and the battery monitor is acting strange.

I Charged it up and once it was done, the monitor appeared to be stuck on (Calculating). If I unplugged the machine it would show the time left in the battery, but if i plug it back in it shows 100% and (Charged) for about a second then it flashed to 99% and (Calculating) and it stays there.

Anyone have an idea what is going on?

Happens to me all the time with my Machine, I heard it was a software problem and there isn't anything that can be done about it.