when Brew was a pup he was off the charts as well.
not obese though, just bigger.
he's 9.2lbs now at 8 months old.
i wouldn't worry about him not being on the chart, i just knew he was going to be over 7lbs because that is as big as it gets on those. You are not alone though! check out the teapot club. those pups would have been off the charts as well.