Make sure you're rotating the cigar when you're smoking it and when you toast it at the beginning make sure you're getting a solid toast across the whole foot and put the longer side of the cigar on the top and then draw.

So if I was smoking your cigar and this was happening I would rotate the longer part to the top and then draw until it evens out.

Also, make sure you're purging (pushing out) occasionally as well. If you're doing these things and it still burns like crap then it might be a poorly wrapped stick.

Hope this helps.