Forum:Need help with weird quest glitch

So i was duping a weapon for my friend on his save, but a weird glitch happened. I got all of his quests, even ones i shouldnt have, like kill crawermax, even though im on the first armory run-through. So, i have all 3 armory run-through quests, which sucks. 3 questions

1. Is there anyway to fix this?

2. Will blowing it up finish all 3 quests?

3. If i do the glitch, will it screw up my chances to beat the quests?