I think two weeks for a root system to develop is a bit optimistic.
I've never done roses but other layerings I just pin to the ground and leave them to sort themselves out over a season.
For potted ones, I'd want to see roots at the bottom of the pot before I planted them out. Have you cut the umbellical cord of the one you transferred from bag to pot?
The leaves developing is not necessarily a sign of roots developing, don't depend on it. Give them time. These are next yea's plants, this year's babies.