I came to the conclusion that using a "Foil Tent" during higher temps, to shield drippings from the sawdust, can actually cause the AMNS to jump rows. The foil acts a reflector, and the heat causes sawdust in the next row to get too hot and combust.
I tested this numerous times with the same results. With the foil tent closely drapped over the AMNS, the rows jumped every time. Without the foil tent, the rows did not jump. I came up with a different version of the foil tent that allows for the heat to escape and still keep the drippings off the sawdust. (2) 12" pieces of wire and a piece of foil.