After taking a break, decided to give it another try. This time from scratch. Since Sesame was reset using the little pin hole, I believe the issue all started from the order of how things were done.
Hypothesis, by resetting lock using the pin hole before unregistered the lock from the App, it will "brick" any chance to reconnect with your Sesame lock.
After rereading the steps mentioned in this forum, it clearly states (in a couple of places) to unregister the lock first within the App before manually resetting the lock using the little pin hole. If this is the case, it is a hard lesson - but lesson learned. Pretty unforgiving if it the case - hopefully someone can confirm if this hypothesis is true or not.
So, thinking through a logical step then would be to uninstall, unpair everything, and then try reinstall the App, create a new account, and add the recently reset Sesame lock. Sounds reasonable right?
So, I installed the Sesame App on my Android 6 ZTE Axon 7 phone. Clicked on create account and enter my information using a new email address. Then clicked submit... the App then prompts that a verification email has been sent to confirm account.
So, I go to my email - but no verification email appears. Ok, it might be my email server (Gmail). I tried again with a different email using a different provider (Outlook) thinking it might be the email provider (not likely, but hey we are problem solving). Again, no verification email appears. Both accounts are working, so it is not that.
Now it is starting to look like the App is culprit. Not sure where to go from here except maybe finding a new device, using iOS, where Sesame was never installed and see if there is a caching or OS platform issue. A bit frustrated now, admittedly.
Also, I tried contacting Sesame support already for another issue that would help them out but I got no response from them yet. If I do hear from them, I hope they can help me out with this issue. If they do I will share.