You are right (couple of posts ago), I do use the Elation DMX Operator, and I'm pretty happy with it.
As said before, only trouble is getting DMX control to the fader by exagerating movement of it before it responds.
As to lights not being in sync, I have the same problem with led Rains, but only when I use color macros or programs, In RGB Mode, they all stay in sync. Have not used the strobe a lot, but if the lights are daisy chainned, and not master-slave, I think that might be the problem. If the lights are daisy chained, and you send a DMX value, I suppose it is possible that different lights respond differently, as one might be just slightly more sensitive, and the other might be just that much less sensitive, etc..
If they are master-slave, from what I understand, its the master that has total control of the slaves, and the slaves respond to the masters commands, not the dmx value.