Hi think you have posted the same question in the other forum too.
Any ways ... here is my reply.
You have listed quiet a few impressive courses out there. But as you have experienced, going through a lot many courses might hamper your score.
For this round of preparation, pick up a course and stick to it.
Also, going by what information you have provided, I think your test taking strategy was flawed during the actual GMAT.
1. Did you take mock CATs in your preparation?
2. If yes, did you take the full tests including AWA and IR?
3. For the verbal part, did you solve the questions for the OG and the Verbal Review?
4. Did you prepare an
error log?
If you have not solved the OG completely, I would urge you to start solving that book and the Verbal Review book.
The questions have appeared on the GMAT and are as close to the test as it can get.