I have seen Saga dozens and dozens of times since it's first airing and I have NEVER seen a red patch like that. I don't have any doubt that the red patch was sold by various Sci-Fi vendors but I can tell you for sure that was not used in Saga.
You mentioned the Pyramid game at the beginning of Saga. I have not seen a complete version of that scene since it aired in 1978. The DVD is at home. I'll play it back and if that scene was included, I'll post any visual observations I can make of it.
Thanks for bringing this to our attention. We'll see if we can solve another one of Galactica's great mysteries.