

Some of those titles may have been requested from other libraries in the same library system. My library limits me to, say, 20 books. But I can request another 20 from Second Library one town over, and another 15 from Third Library two towns over. The books all get sent to My Library and placed on the hold shelf for me, and checked out at My Library. Each library has their own lending policy.
Yeah, it’s messed up. Grumble grumble rude butthead that would check out 80+ DVDs at a time and yell at you if you didn’t check in his returns fast enough (so he could max out his checkouts again).
They might get auto-renewed for another 4 weeks, unless someone’s requested the book (which usually disables auto-renewal).