ui:srir=00 00 00 01 24 B3 0F 11 8C
si:00 D4 2C 01 24 B3 0F 11 8C
PLC:eventraw=03
PLC:eventraw=04
PLC:receiveinsteonraw=04 01 24 B3 00 D4 2C AF 11 FE
3/13/2006 9:05:38 PM:ackmsg=01.24.B3:ON at OUT
PLC:eventraw=03
PLC:SRIR=03,01 24 B3 00 D4 2C AF 11 FE
You can see where the ON command at level 8C is sent to the SDM. The very next line shows the SDM sending the command out at the same level. Then, BOOM, the acknowledgement comes back with the level at FE (254) or full on. The last line shows that this acknowledgment is used as the return for the SRIR command.
It's looks as if either the command was "misinterpreted" by the device or the device is defective. Since ... the device initially went to 50% and then "popped" to 100%, it sounds as if the device might be defective. That or the command was received properly and then a "reflection" was misinterpreted. Reflections and problems such as this may be caused by borderline communications.