I noticed this last Thursday while I was cleaning my car, seems that my right exhaust tip/pipe is lower then the left. So far it hasn't affected the performance or driveability. Here are some pictures so you see what I see, if you have any idea's on how to fix, please feel free to post. I'm guessing its the bar holding up the pipe that you see in the 3rd picture
It does look slightly lower - but not too noticeable (to me). Was the engine hot/cold?
It won't change the performance of the driveability - don't worry about that. It's the length, construction and the width of the system that matters TBH. Although severe 'kinkage' would possibly create issues - I don't see that in this case.
You could try bending the hanging bracket to take up some of the slack. Personally, I don't think it's bad enough to warrant an attempt at a fix, but I know as it's your ride - you might disagree!
Mine aren't 'exactly' level and I haven't seen mant twin pipes which are exactly the same height - most are close, but if I got down there and started measuring, I'm sure I would find differences in just about everyone's.
Arf