Last I checked, X10 hadn't fixed the
Leviton bug yet. Using Macros to turn
them on doesn't work, since it sends them
a "Bright 100%" command.
From what I can tell, the Leviton switches
need an ON command first, followed by
dimming commands.
Try defining a dummy (appliance) module at
the same address. Turn that on, and then
issue the dimming command from the "real"
module. . . .
T