Started the stove this morning after cleaning out ashes. Had a small coal bed after a couple of hours so I thought I would try loading the stove a little different. I have read some posts on here about putting a piece of wood in the back of the firebox EW and then loading. So I raked the coals forward as normal and placed a small split in back of the firebox EW. Then loaded 5 medium splits of Sassafras NS on top of the coals. This left an inch or two space below the splits. Fire took off good and had it turned down in 30 minutes with the stovetop up to 620 putting out good heat. About 2 hours later the fire had burned down about half and the stovetop was down to 530. Went and took a shower and came back out in about 20 minutes and looked at the stove expecting lazy burn and lazy secondaries. Instead I had crazy secondaries and stovetop was back up to 620. I have never had a fire do that before. Was wondering if it had something to do with placing that spit in the back of the stove.