Uneven Burn Question

[Jonsey5484]

I smoked a Diesel Fuerte last night. about half way through it started an uneven burn. The one side just did not want to burn. My questions are, Can the cigars be placed too close to the humidifier? I have had a few cigars lately that have seem to have this problem. I have them in a 60 ct. humi with the humidification device attached to the underside of the lid. I have the cigars stacked all the way to the top of the cedar divider. Is it possible that the cigars are getting too humidified by being on the top of the stack? Does anyone rotate their stock so the same cigars are not always on top? The humidity in the humi has been at a constant 70%. Is it just pure coincidence that I have had a few that did not burn evenly?