Concordance of Research bug

[Karbine]

This may already be known. As a necromancer I have both the book of dark bindings for spell research and also the Concordance of Research which allows necros to work on getting research skill up. I was at the bank with no inventory except the two books and my weight was 63/65 and could not figure out why. The COR weight is 4.0 and the dark bindings book is like .04 . When i removed the COR and put it in the bank my carry weight dropped to 32/65. for some reason this book is registering as 33 in weight. Not game breaking or anything. I did not have anything inside the books at the time.
I'm curious if anyone else has noticed this or if this has happened to others.