Geometry Dash Cloud Problem
Solution 1:
Well the correct way on playing with 2 devices is when you start, and your last session was on the other device, you have to load all your cloud data , and when you end the session you upload it.
If you uploaded your steam data and then downloaded it on your phone I dont see why it wouldn't work.
I also have an iPod touch 5g, and it works, even though I don't often play GD on my iPod.
But if you did it the right way this answer doesn't help at all sorry. Contact rubrub if you think he could help.