yeah I sent out an email and they notified me that I was allowed to leave Vietnam while my application was processing, Just not enter Thailand until the Visa got approved.  they had proof that I was in Vietnam while I did the application and they said that’s more than enough. 
Anonymous participant 571 why are you so angry 😂. Who hurt you lol …. If you do your research, you’ll see that in Hanoi the timeframe is usually 3 to 7 days so booking a flight eight days later was a risk I was willing to take. I could always change my flight which I was planning to do, but my Visa got approved within the eight days.