Hey rangerguy2000, I think you are taking far too many tests in a short interval. My suggestion, take MGMAT tests only in the wk ends. Either 1 or 2 at the most in a week would suffice.
Most importantly, analyze error your tests thoroughly. I was also doing a whole lot of OG questions on SC and RC with a low accuracy (around 50%) without really spending enough time on analyzing my mistakes. I was having this mad rush of wanting to complete all the questions in the OG. I was going through the answer explanations, as if it was a ritual, with out really understanding those explanations. My suggestion is, do fewer set of questions, but analyze them thoroughly including the ones you have done correctly (especially for SC). Quality matters more than Quantity. No point in taking so many tests without analyzing your mistakes.