My LSA was rejected when I submitted it to HDX2. Will I still meet the 11/9 deadline?

Yes! 

According to the message we got through the HMIS Vendor group on November 7th, even a rejection counts for the 11/09 deadline:

“Please note that anyone who has gotten to the stage of observing such an error report or calculation issue has already met the November 9th test deadline to log in and attempt an upload for your CoC. Congratulations. ”