i think my exhaust and my car hate me (constant exhaust leak help!)

[Supaboom]

Ok here is the situation,
Recently I bought a brand new 3" stromung catback for my wrx. I was really pumped when it came in, next day a buddy and me went out threw it on (thanks subaru btw for bending one of my exhaust spring bolts, had to pick a new one up) and started my car up....annnd low and behold there was 2 leaks from where the donut gasket mated with the cat and the stromung midpipe (i think its the midpipe).

Anyway so I figure the gasket must not be seated right, took the exhaust off 4 times and tried reseating it..no luck. I figured then the gasket is probably shot so I go to stholmans and pick up another one (38 bucks ) Go back, throw it on there...and still the same damn leak! I even took it to a muffler shop to see what they could do but they said the flange on the stromung was not seating right and nothing i would really do would fix it (didnt ask about rewelding a flange as I would think this might be a defective unit..).

Now the leak isn't too bad, a small puff of air at the bottom and top of the flange (air comes out right where the gasket is, i checked the welds and there are no leaks coming form there). So I don't know what to do now! can i send this piece back to stromung for another because this is getting ridiculous! Any help would be appreciated as this gets more and more discouraging as I try to fix it
Thanks

-Eric

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