I have had this problem with Mad lighting, unfortunately the dimmer packs are actually at fault. They do not conform properly to DMX protocol.
This is the refresh rate that causes the problem. The dimmer packs would probably work fine if only 192 channels of dmx are sent, as they have time to refresh, but on 512 the speed of processing is not fast enough to keep up.
Some dmx computer software has the option to slow down the dmx packets, this is not an option with daslight, (nor in hteory should it be) the packs are possibly older than the current DMX protocol, or just budget packs designed for slider type controllers.
Music sets the mood Lighting sets the ambience