From: NE Pa, USA
This bug has been there for a while and I just tested it in 2.05 and it is still there.
If you build 80 engineers and send them to a HQ, they will have 160 EP. If you then create a formation in the same hex and transfer 20 of those engineers to it they now will have... 160 EP (instead of 40 EP which they should have). This is consistent.
Also, if you have two formations of, say, 20 engineers in them, and say 40 EP each, if you transfer the 20 from in one formation to the other, the 40 engineers now in that formation will now have, just 20 EP instead of the 40 EP that should result from adding the EP of the two together.
Lastly, and I am not sure about this one as I have not looked at it recently, if you transfer engineers over a distance (normal transfer as opposed to strategic transfer) they will lose all their EP. After this happenned to me initially I always transferred the engineers from the HQ to a formation that was in the same hex but then there were the bugs noted above.