That just explains channel issues, not the strobing with internal programs and stand alone. The revision of the manual is from 12/06, and the 7 channel list is from 5/07, so the manual has yet to be updated for 7 channels or 6 channel lights are still being made/sold. What I stated is merely what was in black and white in front of me and what was sent with the product. It is also quite possible that PU lighting has an older, 6 channel version of the light and not the 7 channel. I know that when I use mine, they respond with 6 channels, not 7. I don't know how old the lights physically are, but Channel 1-3 is RGB respectively, 4 is internal programs, 5 is strobe, and 6 is dimmer. So when patched one to one, channel 7 brings up red on the second light without effecting the first.