2nd time and lower score!

It is not, but depends on the time you have. I am sure you know this, but verbal will be the toughest to improve....

Yes, verbal has been difficult. I took the MGMAT course and have all the books. Sadly I don't think my verbal score has improved much despite the studying. I'm beginning to fear that I have missed something in my learning. Do you think doing verbal problems each day and getting familiar with different verbal problem types through practice questions is a good way to spend the next two months studying?

Not a huge fan of just doing the questions, at least not just to learn.
MGMAT has good materials - the main reason people don't get good scores after going through these are:
1. Skipping steps in strategy or inventing their own strategies and failing to follow instructions 100%
2. Moving to next section before finishing the previous one. This means that you may have to create hand-written notes and summary of each chapter if that's what it takes. May mean, you have to get up at 6 AM and study for 2 hours before work or manage your time better and lock yourself in a place without distractions
3. Non native speaker who has weak English

Any of these apply to you?