Heath, I kind of chuckled a bit when you asked this question and in the same sentence said it was for a HPDE event. There is no issue in using one jack to lift both wheels off of the car on one side, there is no where close to the forces put on the unibody from jacking that there would be from the driving you will be doing at Shubie on the HPDE. If the frame of your M3 was so delicate that it suffered damage from jacking one corner you would have more serious problems!!!!
Heath, in the future just put your jack under the front lifting point on the rocker panel and jack the car until both wheels on that side of the car are off of the ground, it works really well.
*Never, Ever put the jack in the center of the car body or rocker panel since you will kink the panel, damage the paint/sealant, or both. Please only use the jack points to lift the car!!!!
2011 E90 M3 ZCP - Individual Moonstone/Individual Amarone Extended/Individual Piano Black With Inlay:LINK!!!
1994 Euro E36 M3 Sedan - Daytona Violet/Mulberry:LINK!!!