This is dealt with by reducing the size of the bet that you would play on one hand. Due to the 2 hands being invariably link by playing against the same dealer hand, playing your normal bet on 2 hands increases ROR. To offset this - just like if you were sitting at the table and decieded to spread to 2 or 3 hands - each player would bet 2/3 of what one player would have bet on one hand on two hands or half of what one player would have bet on one hand on three hands.
This is not as profitable as 2 players playing at different tables, but is a workable strategy. It also shows the correct proceeduer for spreading to multiple hands, something that you should do in high counts if there are other people playing at the table (this means that you get a higher proportion of the money cards in the long run and allows you to get more money out on the table).
RJT.