I wanted to play a four team MLB parlay today, all on totals. Two of the four were each game of the Twins/Red Sox doubleheader, but was alerted that I couldn't use them both in the same parlay. I thought I knew the concept of a correlated parlay, but these are two totally separate entities. I didn't argue, as I know the books can sort of dictate these things, and hell... judging by some threads I see, I'm rather grateful that my book was up front about it, as opposed to having the parlay win, only to be told it wouldn't count, or to have it lose, and not be told anything. My question is: is something like this the norm at the majority of books?