I was reading the dual shot talent, and I noticed that it didn't mention anything about what happens when you jam/overheat (Unless I am being a derp and missed it, which is very possible). You are supposed to role a single test for both weapons, but what happens if:
1: You jam, do both weapons jam?
2: One has unreliable/overheat/was fired full or semi auto, while the other does not, do they both jam on a 91/94+

3: Both have overheat, do they both overheat on a 91+

4: If they do not both jam/overheat, how do you determine which does?

Presumably, each weapon is affected as though you were making a normal attack with it and had that BS roll. So, yes, you can get really screwed on a bad roll.

RAW seems to imply that both weapons jam. However, as a GM, unless they roll a 100 I'd just jam 1. The most unreliable one, or just randomly choose one.

Both jam by RAW.