11.1 "Those that still cannot trace a valid Supply Path are eliminated (i.e., removed from the map) two-step counters are placed in the Surrendered Units Box, and one-step counters follow the instructions on their counter backs."
Now, since Russian units start the game explicitly as one health units (2.3), then that would imply that brown Russian units would NOT go to the Surrendered Units Box. So, the question is: until turn 17 (7.3),where do these units go?
The soviet " temporary until turn 17" one-step units are STILL two-step COUNTERS. The only real one-step counters are those without any strenghts on they backs ( they have turn of entry instructions instead).
So they go either on the eliminated box, or surrendered box if Out of Supply.