Re: latest numbbers
If thyroid tissue grows back after surgery/RAI, it's hard to tell if it's benign thyroid tissue, or cancerous, so they consider it a "recurrence" and they would then treat it with RAI. So yes, if in a year or so, a scan "lit up" and revealed thyroid tissue in your body, they would treat you again with RAI.
Here's how I think of it: If your tsh is high, your body is calling for more hormone, and tissue can grow back to fill that need. If the tsh is suppressed, (very low, mine is kept at .04) then the body should not be requesting hormone to fill a need, and no tissue should grow back.
I would discuss with your endo. the ideal suppression point. I don't even worry about the other numbers at all, I feel fine, so I just worry about the tsh.
Also, if you have thyroglobulin antibodies, they will not be able to use thyroglobulin levels to monitor you for a recurrence, so you should discuss this with your doctor as well. You may need more regular ultrasounds and scans to monitor over the future.