Yes, getting more complete data would certainly help! Given the other issues, I'd take the testing with a grain of salt. Why were you testing at this point? Do you need the scores for something and would you do something different than you are now if her IQ fell around 130 or fell around 100?
I do know two kids whose parents have had them tested on the WISC who are high performers academically (in GT placements in school) who came out with IQ scores right around 100. Both of these kids had high scores on PSI and WMI and lower scores on PRI and VCI. The one whose mom has shared the most & who has tested twice on the WISC, found PRI to be the lowest with her dc. I've wondered in their instance if having high speed and good recall contribute to overachievement.
However, these kids don't have any other exceptionalities that would have likely supressed the IQ scores. I do think that it is possible for an avg or high avg kid with good supporting skills such as WMI and/or PSI to perform higher than would be expected given FSIQ. I wouldn't be sure that is your dd's case if you feel that it isn't, b/c you have a family hx of giftedness, and b/c she does have comorbidities, though.
