I noticed that sometimes I would play up to wave 7+, I get a second weapon and the upgrades for said weapons won't show up on the zedternal menu.

I might be because I have changed a few things around in Zedternal (like spawn rates and skills, but that's a different story), but I'm not sure.

Fix maybe?

Update: I noticed it does so when I take a 2nd weapon that takes up the same type of weapon as my first.
Example: I take the HM pistol first, get the HX later, and the HX upgrades don't show up.