01 00 follows 00 7F in Midi data
Midi data is seven byte, not eight. 7F is the highest byte value. Bytes beginning with 8_ and higher are reserved for Midi commands.
127 = 00 7F
128 = 01 00
If you want the control to cover the full 16383 range fro 00 00 to 7F 7F, you will need to use named ticks, best loaded from a spreadsheet.