Best book for Round Robin parlays?

For some reason, 5dimes doesn't allow just groups of 3's or 4's. When you click on just 3's it gives you 2's and single parlay as well and they claim that the system automatically does that and there's nothing they can do about it. Is there a reliable book out there that you can on round robin the group amount that you actually want without issues? Thanks.

Parlays are bad news man 

Yeah I know. I've hit a few big ones though so the news isn't always bad.