Typically the reason is the bunch is booked to one side... in the case of the photo shown this mostly likely the case - that "spike" of tobacco you see is the ligero which will always have the tendency to burn slower. When the ligero lies dead center however it will typically burn better or even if it doesn't will result in a point in the center of cherry - what I call coning. Coning is acceptable imo depending on the materials and depending on to what degree of separation occurs. But as you can see in the photo, it is off center which means the right hand side of the particular cigar shown was booked.
Disclaimer: This is my best guess assessment looking at the photo - it really isn't possible for me to be certain without seeing the cigar myself.
STS
