I didn't think that was allowed. I thought they had to be in individual races. I seldom do that sort of bet, so its a new one on me. Well done on the bet mind, ignore my ignorance of the bet!
Nass: You are correct. You are not permitted to include 2 horses in the same race in any multiple bets
you may be right but my bookie paid out and didn't say anything - maybe the bet was taken by mistake and he just decided to pay out without saying anything