Why are num trades different than actual trades placed in brokerage account?

63 trades vs 47 placed in brokerage account ? So why were the rest of them not placed there ?

Option expiration doesnt count as placed trade in broker account.
Btw instead of shorting vxx and shorting puts you can simply short ITM Calls at the same strike. Same risk/reward profile but it lessens transaction costs significantly.

Good luck.