Fisherman, your pixlite16 advanced config window should have start channel of 1 for every one of those outputs. To the controller, you are starting at channel 1 for that output. It looks like you are trying to put in the matching channel number from xlights, which is not the way that is setup. Your pixlite4 should have been the same way. You see how your end channels are spanning into another universe? That shouldn't happen when you only have 134 pixels in one output of a pixlite controller.
Let me know if that doesn't make sense. I've accidentally done the same thing a couple times before...
Louie