Ok, that would be the same with a relay or any control device that isn't user activated.
Sounds like a good opportunity for a standard. All dimmers and lights that meet the "dimming control" standard will be interoperable.
I was going to return both the light and the dimmer, but I ended up using them separately. They talk about voting with your wallet and I like to return things so people know when they screwed up.
Heck, I bought a couple of brass table lamps and when I couldn't use them with CFLs because the harps were too short, I returned them. Don't know if it will do much good, but that's pretty much true with any voting, eh?
Rick