Did anyone else have problems with replacing their old upload with a new document? How did you resolve it?

Please I have a pressing question. How do you delete uploaded documents on the NYSC site? I was trying to upload my documents for lost WAEC certificate, but I don't know how to delete my old uploads that were the WAEC print outs, so now there's too many O level Certificate uploads. I don't know if the NYSC people even look at the ones at the bottom, which are the correct ones, so I still have not been evaluated.

Also has anyone else lost any of their certificates? Did you add that Police Report document or did you manage to get your call-up letter without one?