Hi

Two weeks should be fine, can you give it a little longer?
It's always easier to seed a smaller tank from a larger tank than the other way around.
Transferring water really won't do much good but the 10g filter should.
Once you move the 10g filter out of the 30, keep a close eye on your parameters.
Don't add anymore fish until you're sure you have a solid cycle.
After you put the 10g filter back in the 10g tank, it should still be cycled and ready for a couple of fish, but again, keep a close eye on your readings.
Do water changes as your readings indicate.
What are you going to put in the 10g?
Good luck!