Maybe the APP does not have a way to determine old or soft start modules.
Soft start modules will work with Extended x10 messages.
AHP uses Extended X10 messages for modules from the Lamps List and the old X10 On and dim for the
ones in the before soft start list.
This is from Smarthome Manager Essentials motoring.
B1 old LM465, B2 Soft Start LM465
My Date Code 09J44 will not dim below maybe 20%
AHP GUI dimmer slider to around 50% from off
R: B1 - 1:04:14 PM 8/25/2018
R: BOn - 1:04:14 PM 8/25/2018
R: BDim - 1:04:15 PM 8/25/2018
R: BDim - 1:04:15 PM 8/25/2018
R: BDim - 1:04:16 PM 8/25/2018
R: BDim - 1:04:16 PM 8/25/2018
R: BDim - 1:04:17 PM 8/25/2018
R: BDim - 1:04:17 PM 8/25/2018
R: 1110101010010110101010101010010101011010101010010110100101011011101010100101101010101010100101010110101010100101101001010110000010010101 - 1:04:26 PM 8/25/2018
I am not sure if the monitor missed the X10 Address message when trying the B2.
I tried the soft start LM465. 30% On. Turned off and back on. it went to 100%
The old LM14A 30% on. Turned off and back on. It went to 30%
Can't say about the wall switches. As they are advertised to have soft start and preset dim.
http://kbase.x10.com/wiki/Newer_WS467s_and_Preset_Dim