Hi there!
Based on your growth chart (nice job, btw, I did that when mine were babies) they both seem to be growing at a great rate. At 16 to 17" and 6 to 7 months old, I've noticed is when they tend to start slowing down (mine did, at least, though Taz was much longer than Kaira, Taz had no tail nips and was over 22" long when he finished growing, but he slowed down before the last few "surges" in growth, Kaira is a little under 18", I believe). Your two aren't done growing, but most of the major growth spurts have likely happened (Taz appeared to be in constant sheds from 3 months to 6 months old, but Kaira shed more often than Taz did later on, Kaira got wider faster, Taz longer, so it depends on the beardie, their genetics, etc. and sometimes varies with gender). There's also no downs, they've increased in length and weight every time, so I really think you've got 2 very healthy beardies.
The patchy sheds will likely start for your 2 between now and 1yr to 1.5yrs or so. That's when (IMO) they get really difficult :roll: .
Hope that eased your mind some
,
Abi