Lightroom shows file count on a drive, but no files

I'm trying to get some order in my LR files. All my images are on a volume named PhotoLibrary and in a folder named Lightroom_Files. Except I'm finding what appears to be files located elsewhere. It appears that my catalog has files on startup drive, MacintoshHD/Pictures. 1147 of them. Except there aren't any files in the catalog that reside in this folder.
Is it just telling me how may images are there, but not in the catalog?
confusing.
