The expected amount of small bets won is 10612, the amount won is 10558, a difference of 54. Since this is a simple binomial distribution, we can easily find the standard deviation, which is 73.2. So the observed outcome is less than 1 sigma from the expected outcome. This is not significant in any way, shape or form.
Doog has separated the bet amounts arbitrarily. In this case, you can only be certain of the win/loss distribution for these bet sizes (not that I expect it to be a significant difference), so logistic regression would be a more reliable approach.