Timemachine/Timecapsule questions

Got a quick questions see if anyone can help me out...I have a mbp with a 250gb hdd My wife has a mb with 250hd both of our hds have about 89gb used. but my time capsule is saying its only got 22gb left of 500gb. Im trying to figure out why my time capusle is full? only other file on it is my picture backup which is 24gbs. Also my time-machine back up is showing a 259gb file size and her backup is showing a 187gb filesize it makes no sense to me. Can anyone help me out with this?... anyone know if the time machine back up the whole drive even though only 89gb of them are used? hope some one can help me shed some light on this situations thank!

 

I got it last year around October so let's say 6 months