You just got a base flash. I'd get it on a dyno and have a custom flash done.
That should sort you out.
I think AMS only charge about $200 for a reflash. You wont be dissapointed with a custom tune....that I can vouch for.

 

that is normal

 

After I installed my tbe I noticed a lot of black smoke out the back.. It is normal because you are allowing more exhaust to flow through .. Therefore you are seeing more of the fuel coming out.. aka . being more rich.

To clean the rear bumper, I ordered a carbon fiber exhaust heat shield and I just clean that with glass cleaner every few weeks.

Hope this helps!!