Yeah there is really no need for dual cores inside a DS flash cart. It is marketing. This is just another R4 clone I'm assuming (without looking around to compare). It has one chip for flash memory and one to process the games, as their site claims. But doesn't an R4 dump the sram onto the microsd anyway? I'd guess that both chips are for processing. One to process the game and one to process the saves.
Anyway if you have a lot of trouble with a card that you got in part of a deal, it would save you time and effort to just buy maybe an Acekard 2i. That's what most people here would do.
Sometimes I buy carts for novelty but I don't use them too. I just bought the R4 Gold in the gold packaging and don't plan on doing any gaming on it. It was only 5 bucks. Acekard 2i can be found for less than triple that.