L.B.
Honestly, I wouldn't worry too much about it...if she is doing well, eating and active she should be fine...I HATE those things that make you feel that the kid HAS to perform at a certain level to pass...it's a guideline only! My daughter was 10.65lbs at birth...I couldn't breastfeed her beyond 4 months..I just couldn't keep up...yes, she lost some on the formula but man...that kid could put away 8 FULL 8oz bottles a day! NO kidding!
Offer the food, keep the variation in there but I wouldn't worry too much about it. You say she's energetic and happy which should be enough. Besides...you'll laugh in 15 years when all she wants to do is LOSE weight and here you are trying to pack it on! LOL...keep it all in perspective, my friend. It's only a couple of oz...