Channels above 64 not working

Hello, I’ve inherited a Congo jr for a school that has 16 mpx dimmers. I’ve installed a Leviton 501 with dmx and mpx out. The mpx works as do channels 17-64 on dmx. Problem is, we bought 20/5ch led pars and 4/14ch movers. After building template for the new fixtures everything works as long as the address is <64. The console channel downgrade is @ 1024. Any idea what I could be doing wrong?