Unenrolling in Beta was a mess! Am I on the final build now?

I had preview 5 on my phone with I manually installed (via a cable and my computer). I decided I was done with beta versions so I went and unenrolled myself.

First, it said it was taking me to what looked like the final 7.0 build with a very small download and update (like 50mb). I agreed, it did the little download then told me it was going to restart my phone. It didn't. Instead, it popped up another update screen saying it was going to take me back to Marshmallow AND wipe my phone.

I went and re-enrolled in the beta and reboot my phone hoping the "update" to Marshmallow would disappear. It didn't. It was insisting I do it. So... I told it to download it and thought it was going to wipe my phone. Not happy. :( It downloaded the 700+ MB file and said it was ready to install. I clicked the button to do the install and reboot.

It didn't. It then popped up the same notification about 7.0 with the small download. I accepted that one. This time, it actually did reboot my phone. I had no idea what I was going to end up with.

Well, it did NOT wipe my phone and I now have build NRD90M of 7.0 with the AUG 5 security patch. I thought it said it was giving me the version with the AUG 8 patch. ???

Can someone help me by answering these three questions....

1 - Am I on the current and final build now?
2 - Is there a 700+ MB file of Marshmallow sitting on my phone somewhere? Can it be deleted?
3 - Do you think I will now get regular OTA's from now on after this mess?

Thanks guys!