@Noah *************
You did not renew anything. Given what you are describing, it sounds like you got a:
One Year Extension of Stay based on Being Over 50/ "Retirement" from a Non-OA Visa.
The key word is "Extension of stay". You are *NOT* on a visa, and that visa expired a few years ago.
For a brief refresher about visas:
A Non-OA VISA is a multiple entry visa, acquired outside of Thailand, is valid for one year, and on each entry allows you to stay for a year.
A Non-O VISA is a single entry visa acquired outside of Thailand, is valid for 90 days, and on entry allows you to stay for 90 days.
An in-country Non-O Visa is a "ZERO ENTRY" visa acquired INSDIE Thailand, is valid for 90 days. It's "Zero Entry" because you acquired inside Thailand.