Bug on skill atrophy?

I'm not sure whether this is a bug or not. I trained my driver to level 20 on all three skills trained by "speed". And after one race it is down to 19 again. I am also quite sure (though not 100%) that he was level 16 and is now down to 15. I read about the atrophy, but should it really work that way when the driver is only 24 years old?

That's my driver: http://igpmanager.com/play/?url=team-driver/4767

It doesnt show decimal places, and as far as i know the stat rounds down, so even if atrophy is 0.1 or so you will only show as 20 for 1 race then show as 19  [althought your 19.9] so its entirely possible to appear to lose various stats [and possibly a level] after each race although training post race should put it back up

Thank you, I will keep an eye on it.
But as for the level: shouldn't it improve or at least stay the same? Considering an atrophy of 0.1 (or even more, when <1 ) on 3 skills, improving other skills by one point should improve the overall level, right? Or is that also rounded up?

If your training after every race [keeping health/morale high] and not training stats to 20 then it will constantly improve[even including atrophy], although at higher levels whether intentional or not it seems like you will "effectively" atrophy more, as you no longer have stats at 1[which will never atrophy as 1 is the lowest a stat can be]

Depending on stats and how atrophy falls its entirely possible that you could lose on the "blue bar" or level [because more than 3 stats moved from say 19.1 to 18.9] so it negates the +3 you gain from training. 

Think of it as a leveling system for that ability. You arn't level 20 when you are level 19 and nine tenths leveled :P