Aye you cnut, you did waste it. Especially when there was little old me begging to have some on it but couldnt find a shop
You need to stick strictly to singles i reckon.
I have adopted it now. Don't even do doubles really and it has really paid off with a lot of profit in last couple of weeks.
The money builds up slower obviously than trebles etc but you will find yourself having far more profit in the long run.