Not necessarily back to the drawing board mate, on most days the first 3 races at meeting will generally contain a lot of maidens and unraced horses which make for very bad betting races. I have a friend who is vice president of a race club and they always program the weaker races first as they attract less interest so you want to get them out of the way.

Even on Saturday's the first 3 races are generally 2 yo, lower benchmark races, etc so maybe go back over the past few weeks and do it for the last 3 races at each meeting. Also you could simply choose the 3 highest class races at each meeting and see how they go.