Big reel to reel data tapes didn't have the best labeling and could be stored in cans that might not match the spindle's label. I could imagine it pretty easy f

Big reel to reel data tapes didn't have the best labeling and could be stored in cans that might not match the spindle's label. I could imagine it pretty easy for a tape to be stored in a mismatched can and then get sent off to a storage area. The "right" can with the wrong spindle ends up in the archive while the "wrong" can gets sent off to a warehouse or reused or whatever. Apollo was a huge project with a lot of people. All it takes is one person too busy to notice they put a tape in the wrong can.