Hi Christopher,
Par 3's aren't taken into account when Driving Accuracy is calculated. We would leave it off and your accuracy would be counted as 8 for 8 on non par 3 holes.
Sounds like there may be an issue there with it not counting a fairway in the stats if you drive a green on a par 4. 7/8 would also be 88% accuracy. We'll look into this.
Thanks for the report. =)
*edit* I was able to duplicate this and suffice it to say something is off there. We'll look into what's causing that and get a fix out ASAP.