The stat adjustments are double what they are supposed to be. I am getting +4 STR, +4 INT, -4 CHA. This also goes for the armor bonus, although the bonus from the old skin is deflection and the new one is natural.
I did not verify, but I believe the penalties to compensate for half-elf stats are also doubled up.
The new version also uses the green sahuagin skin, while Ixtiotl had the blue-gray one before.
Everytime I've tried I've gotten the correct modifiers. Are your changes all permanent or are some temporary?
There should be no penalties to compensate for half-elf; all the bonuses have been removed.
On the skin, get another DM to set your appearance like you would normally. If that doesn't work (or if it does but the new system overrides it) I think I know why and the fix should be easy.
The changes do not go away with resting, but my stats display as adjusted stats (positive buffed stats in green, negative in red). I think my character has the old creature armor item equipped, which is giving stats that stack with the ones from the new system.