sooo, i don't know if i'm the only one seeing this but i pretty much think that dragons can grow from level 1-3 and level 4-6 if you know what i mean. here's an example of my own island:
the trickster dragon on the left is on level 6 and he seems to be slightly bigger than the one on the right who is only level 4. could you maybe check your own islands and see if your duplicates have a different size? or even someone from the TL staff could give us an answer.
please don't think i'm crazy or something