Hi tobey87,
Test Day is a rather specific 'event' - the details are specific and they matter, so you have to train as best as you can for all of them. The more realistic you can make your CATs, the more likely the score results are to be accurate. The more you deviate, the more "inflated" your practice scores can become - and that's likely what happened here. By skipping sections, taking the CATs at home, taking them at different times of day, etc., you have not been properly training for the FULL GMAT 'experience.'
Test Day involves a variety of really specific steps and parameters (including steps before the Test even begins - such as leaving your home, traveling, etc.). Every factor matters, including the psychological ones. When you sit down on Test Day, you KNOW that you're going to be in the Computer Lab for about 4 hours - but if you're just taking individual sections (or taking a CAT without the Essay and IR sections), then you KNOW that you'll be done in 1-2 hours. The attitude and energy that you use during practice will NOT be a match for what you'll need on Test Day, so it's not a proper way to practice. Right now, it's not clear what your actual 'ability level' is - so it's difficult to define the specific areas that you need to work on to improve.
I suggest that you plan ahead and set aside the proper time to take a new, FULL-LENGTH CAT in a realistic fashion (take the FULL CAT - with the Essay and IR sections, take it away from your home, at the same time of day as when you'll take the Official GMAT, etc.). I understand how busy you tend to be, but there really is NO substitute for this data (and it's essential to helping you hit your Score Goal). Once you have that score, you should report back here and we can discuss how best to proceed.
Since you're planning to apply to some highly competitive Schools, you would likely find it beneficial to speak with an Admissions Expert about your overall profile and plans. You do not want to 'rush' in any applications if they have 'weak spots.' Your real goal is to get into your first-choice Business School - and you have to make the proper decisions to maximize the possibility of that result. There's a Forum full of those Experts here:
https://gmatclub.com/forum/ask-admission ... tants-124/GMAT assassins aren't born, they're made,
Rich