It's not strange that preplaced generals in the game have "weird" anicllaries, or traits. There are many examples in original RTW too (doctors for bruti, etc...).
But, I try not to alter them, since that could shift campaign balance (-2Inf in this case), and it's not like the ancillary isn't doing any fuction (also when diplomat talks to general, both of them have their influence shown).
P.S.
There will be another version (2.02) shortly, since I found some bugs with Good/BadConspirator line of traits (it seems that CA fix they added isn't doing its job).
It probably won't get available unitl bug-fixer gets officialy released at TWC too (currently download waiting for review).
Bookmarks