When I go to edit a member of a band, it never lets me add or edit their current or previous bands.

https://www.metal-archives.com/artists/ ... aff/719063

for example, this person also does vocals for a band called Mourning Anguish right now, and I have no way to add it. Am I a complete idiot, or is my profile just unable to do that yet?

You need the rank "Veteran" (1000 points) or higher to do stuff like that.

Further info:
https://www.metal-archives.com/content/help#tab_ranks

Just flag reports for stuff like that. Seems like this one was already taken care of though.

Aw man, 1,000 points would take me FOREVER. I don't think I'll ever get it. I mostly only edit bands from Las Vegas & most of my knowledge is in deathcore. Only deathcore bands that are more on the death metal side get on this site too so it's extremely limiting on what I can actually edit.