Td5 high/low???

Can anyone shed some light on this? I've just run Nanocom and as I was playing I noticed that it thinks that it is in low range when it is really in high range and visa versa.
Has anyone else found this and can anyone say if this will effect the proformance IE engine mapping.
It is a 2001 manual.

I know that the ecu map for a auto is different to a manual but dose the high low range make a difference