I have the same problems as well with a few Design LED 36s I just ordered. Great lights, but the standalone programs have strobing in them as well as the internal programs via DMX.
Also, according to one of the paper manuals I have in front of me right now, there are two DMX modes. The first is 6 channel mode: R, G, B, Programs, Strobe, Dimmer. The second mode is 3 channel mode: R, G, B.