In the Kirlian Photography scene, Dr. Burks is seen sliding an undeveloped plate into a chemical tray. When he removes it moments later, you can clearly see he removes another plate from beneath the one he slipped in, both being clearly visible.
At 18m 08s Dr. Burks puts the film into a tray of developer, but no stop-bath after that.
When Mulder and Scully get to the storage unit it's locked with a padlock from the outside despite Betts being inside the unit.