JimS that post you refer to on Ricks forum is dead on.
I did a little experiment scanning G18 from 12000 to 12200 and picked up 4 or 5 stations, it completely missed UWTV as usual. I then did a scan starting at 12030 to 12230 and succeeded in picking up an additional 4 channels including UWTV.
So it appears the program is indeed scanning in approx 60 MHZ steps and if a signal is far of the center frequency of the step it will be missed even if it is very strong as is the case of UWTV. Just what the optimum step size is I don't know although 30 MHZ appeared to work well, unfortunately as usual the is no provision in the program to change step size and it is difficult to import the data into the channel list, I had to create an additional satellite in the sat list to avoid wiping out the data for the from the first scan.
Even if somewhat cumbersome this procedure produces significantly more useful results, now if only DVBWorld would update the program.