Everyone worries about whether sending multiple scores with an improvement on the second batch some how hurts your chances. It doesn't.
The AdComm's don't spend that much time analysing the pattern of your scores. They typically take the best one, since it speaks to how well you can perform after a good solid study effort (exactly what they want to understand about your ability to cope with the MBA program).
If anything, a score improvement shows that you're committed and ready to put in the hard work to achieve your best.