When I set a channel to full, it turns off. When I set the same channel to 0, it's actually outputting at 100% intensity.
Explanation of Issue
The channel is likely flipped. A flipped channel’s DMX output is at full when the channel is set to zero and at zero when the channel is set to full. Two lights can be made to work in opposite directions if the output of one of them is flipped. For example, if a flipped conventional light and a normal conventional light both are recorded to a submaster, one will brighten and the other darken as the submaster slider is moved.