If the uneven burning happens to a lot of your cigars, you may have too much moisture in your storage box. When I first started, I went with the "conventional wisdom for storing cigars: 70 degrees/70% RH", and had a lot of cigars burn faster on one side (canoeing). After finding this place and reading a lot of the info being exchanged, it seemed that most of the fogs here keep the RH in their storage boxes at closer to 65%RH, so I did that. Guess what? Very few of my cigars burn unevenly now.