This is a normal occurrence.
The blue damage numbers are the numbers that the aspect itself came with. Which is based on level, item level, and a couple other factors when that item dropped.
The actual range that you see beside it is the max range that will be applied to any new aspect as long as the item meets the level/itemlevel/etc requirements.
I have an aspect that is below the range, and I also have an aspect that is above the range.
It is a terribly confusing system but thats just how it works. Its not bugged. They just decided to make it that way. For whatever reason.