Hi anksm22,
You have to define the REAL goal in this process:
1) If the goal is to make the Round 1 deadline, then you still can (but you might not get into your first choice school).
2) If your goal is to get a scholarship, then you have to determine if there's some flexibility in terms of which school you attend (since some schools might give you a scholarship while others might not).
3) If the goal is to get accepted at a particular school, then the deadlines do not matter and you have to do everything in your power to put together an amazing application (regardless of when you apply).
Once you've defined the goal, then you can look at the deadlines and plan your schedule accordingly. If you want to retest after your October 7th exam, then you could probably take the GMAT 2 more times before most Round 2 deadlines. You would probably have to invest in some new GMAT resources and learn to approach the Test with some new tactics though.
GMAT assassins aren't born, they're made,
Rich