Yup. I was "on a list" for SEVERAL years on Air Canada. I arrived legally, but the agent tried to prove I needed a visa and couldn't enter. I knew I was right, I let him know I knew I was right and he was wrong (That was my downfall). After a few hours, he HAD to begrudgingly let me in.
But EVERY flight into the country after that for several years, I was "sent to the other room". I even put the hour wasted in there into my travel/transfer timings over the years. After about 2 years, Canada immigration officers would ask me why I was on the list. I kept saying I have no idea. What does YOUR FILE on me say? They would say there is no details. I would ask "can you remove me?" They would always say no.
Then one day I met my saviour. The female Immigration officer says "I can't tell why you are on the list" I said "I have no idea either". She hits a few keys "ok, there. You are off the list". I thanked her, and told her I had been trying to get off the list for years. She said she was a high ranking supervisor, and could do it.
One other option is that you come visa exempt or 60 day visa (depending on how long you will be there without your hubby). Then you meet him in a nearby country like Singapore and hang out for a couple days. Then THAT way, you are both now entering Thailand on the same terms and dates, and any future visas, exit stamps, and extensions will be identical.
How long is he staying? If it is only for a month or 2, he could come visa exempt and then either extend at immigration, or take a short trip somewhere to reset the exemption.