I spent a good part of today (which happens to my birthday) working in our school library. Our school (and probably 90% of the libraries in our district) doesn't have a school librarian. We have managed to keep the library open, but just barely. I go in a couple of weekends every month. One of our teacher's sons, who is working on his GED, helps a little bit every day. Teachers do a lot of their own check out. Some of our teachers, and some of our kids, also try to help. It's definitely not an optimal situation.
When you don't have a school librarian, there are piles everywhere.
When you don't have a school librarian, books only kind of get put away. (These are graphic novels that were checked in and put back in the right general area, but were never actually re-shelved).
When you don't have a school librarian, kids don't put books back on the shelves correctly.