That is a big one, I know it would be a hell to program for you guys.
If you move a fixture on the patch, it screws up the programing of your scenes. It is normal as the programs learn what to do with CANALS, and do not give a damn about the fixtures.
Same thing when importing groups and scenes from another Daslight file, the patch needs to be the same (at least for the fixture whose scenes you import)
The thing is : if you want to replace fixtures by new ones, and you do that regularly, you end up with a patch with more holes in it than a swiss cheese
Losing canals in the process...Being able to rearange the patch without losing the programing of the scene is a tough one... but it would be great !
Cheers