I suspect I know the answer to this, but it may be something others have experienced:
Using TransDem (86) and T12 (61388) and Windows 7, I recently tried to re-create all the 200 UTM tiles I am using on a route.
After figuring out the T12 import process, I commited the scenery folder created by TransDem. Everything worked fine except that I have 2 or 3 copies of the same UTM files throughout the route - all placed neatly in the correct places!
I will try this again but I suspect this results from committing the route first, and then the scenery folder with UTM files? Otherwise I will have to go through my route and delete all the excess UTM tiles which is quite fiddly!
Any quick advice on this issue?