I recently made a submit once I got the confirmation email it came through with two of the same one and on wayfarer ( had to withdraw one of wayfarer )
One submit used two of my available submits of Ingress.
Did it show some sort of error when submitting? I have had something similar happen - i was submitting and:
The errors when submitting are being shown even if the submissions go through - i checked in the next 3 submissions i did (2 of those also had errors but went through even with the error).
After an error occurs when submitting, just make sure to check if your remaining submissions went down - if they did it's a sign it went through.