Yea I found all those flavored charcoals do seem to burn faster, fine for grilling, but for smoking I dunno.
Must be those little bits of wood cause them to go all out.
I am not surprised, the wood will peak more quickly and fail more rapidly than regular charcoal. The wood itself is simply embedded in the charcoal matrix and will burn off faster than the surrounding charcoal.
At least I think that's the way it works.
Back In Jan. I picked up 4 bags at HD for $2.83 each on clearance.
I didn't notice a duration problem using it for grilling and liked it fine.
Bought it knowing the wood chips would burn up quick and not add much smoke.
ChuckO likes the K apple better.