If you went from .02/.04nl (4nl) up to .05/.10nl (10nl) you would essentially be moving up in stakes (leveling up I guess). Make sure you are only doing it if your BR is deep enough to play at the new stakes comfortably.

The general rule on BR management is to have 20 buyins for the stakes you want to play. Say you have a $200 roll you could move from 4nl to 10nl as you have 20 buyins for 10nl.

And the play doesn't change much (if at all) in the microstakes. The change in skill level from 4nl to 10nl should be practically non-existant.

And no, I've never sent any of that information to PokerStars, Ultimate Bet, or Full Tilt. So yeah, that does sound fishy.

Good luck.