@Antonio ***********
you are confusing things.:/
First off you got a single entry Non-O visa because that's ALL they sell in Vientiane. You went to the wrong consulate to get a year-long, multi-entry Non-O based on marriage.
Now you have two choices; You either apply for a yearly extension of stay at your immigration office based on being over 50 (retirement) and by showing the required proof of funds, submitting the documents, etc OR you apply for a yearly extension based on marriage to a thai at the immigration office again by showing the required proof of funds and submitting the required documents, THEN once you get your extension you BUY a multiple re-entry permit which will let you travel in and out the entire year getting you stamped back in until your extension expires every time you enter the country.
OR
You go to the correct thai consulate (Savannakhet Lao or HCMC Vietnam) and get a year-long, multi-entry non-O visa based on marriage. That visa is unlimited entry for the year it's good for, will stamp you in for 90 days every entry and when that runs down you go to the border, stamp out of thailand, stamp in and out of another country and then back in to thailand to get a new 90 day stamp. You do that for the whole year the visa is good for,
Those are your choices.