timmmay: When you have 2x10A outlets do they run two 10A cables, or one cable to both with the assumption that you'll never draw 10A from the sockets? Watching qualified electricians doing things at home it looked to me like one cable ran around a whole room, so you shouldn't draw more than 10A at a time per room or circuit. I could be wrong, I'm not an expert.
Having 10A socket outlets doesn't mean the circuit is rated for 10A. It's usually 16A or more often 20A, so it can supply multiple outlets. The circuit rating is indicated on the breaker in the distribution board.
Most sparkies would wire a 15A socket outlet through a dedicated circuit, but it might be able to share a 20A circuit if there's not much else on it.
In any case you need a sparky to advise.