You have a 36" chest. The pit to pit is doubled, and most jackets will have about 4" extra room in the chest to move- your standard size 36 would have a 40" chest. This one has a 42" chest, so you'd only be removing 2 inches from 42. Still, that combined with the waist size of 32 (standard drop is 6" from the chest size, so a size 36 has a 30" waist standard), makes me pretty sure the seller just mislabeled it. Theoretically you could take it in, but if the whole thing is a size too big that's best aboided.
You're looking for jackets with a pit to pit of ~20".
Thanks, I'm still REALLY new to this, first time I took measurements of myself was yesterday
I'll probably pass this one on, I'm not really in need of a suit right now, it would have been more of a spontaneous purchase.
But once again, thanks for such a thorough explanation ^^