The clearances listed for double-wall pipe in all Kuma Stove manuals and on listing tags should not be interpreted as absolute requirements.
For the purpose of a stove installation, double-wall pipe clearances are listed on diagrams as a relative distance as it relates to the actual stove body clearances, specifically the vertical section of a connector pipe.
Double-wall pipe stands on its own as a separately tested and listed part of a hearth system. This is proven in the fact that no double-wall pipe installation manual will refer to stove manufacturers' clearances as having any effect on the double-wall pipe.
For example, the language below is the entire clearances section copied directly from the Dura-Vent manual for their DVL (double-wall) pipe. There isn't even an implication that the appliance may affect these clearances:
CLEARANCE:
6” clearance to walls
8” clearance to ceiling
Clearances are measured at a 90 degree angle to the pipe.
So, as long as the double-wall pipe manufacturer’s minimum clearances are maintained, the double-wall pipe is allowed to offset from the stove closer to the wall(s) as might be necessary for truss alignment in a vertical installation, or in the case of a wall exit, the double-wall pipe may be closer to an adjacent wall or ceiling than the “reference” clearance that is listed with a stove’s installation diagrams.