UFO:Alien Invasion

I wanted to check how the new stat increase system works, so I've started a
new game with the svn 14898.
I've renamed the soldiers by adding to their name their speed and accuracy
stat. For example, if soldier 'Britney Spears' has Speed 18 and Accuracy
27, I've renamed her 'Britney Spears 18 27'.
After the first mission (I've tried this three times, one at Normal and the
others at Hard difficulty), the stats were completely changed compared,
For example, the first soldier increased one point in Accuracy; another,
lost 6 or 7 points in speed. The new stats seems to be completely different
than the previous ones.
Also, after the second missions, some soldiers went to 0 in speed (but I
think it is another bug).