
That is because the data is messed up. Well Zaggy took it upon himself to fix all the Russian data (as well as China). You can download it here:
http://www.simmersworld.com/~openskin/terres.htm
Note: I've only tried the Western Russian dataset (and just for the small region of Russia next to the Caspian Sea on the Iran Theater). But it definitely looks promising!
Thanks Blueprint!