What should I expect when re-entering Thailand with multiple entries on a DTV?

Had a really strange immigration experience coming back into Thailand a few days ago, and I’m curious if anyone else on DTV has run into something similar.

For context, I’ve been in Thailand cumulatively for about a year, but during that time I’ve also been traveling a lot. Singapore, Malaysia, Japan, and elsewhere. My passport has stamps from all over. This has never been a case of staying in Thailand for long continuous stretches and doing border runs. I’ve never done a border run in my life. I’ve always left the country properly, traveled normally, and applied for the correct visas when I wanted to stay longer. Everything fully by the book.

This time around, I had been in Phuket for about two and a half months, left to travel, spent five days in Japan, and then flew back into Phuket.

At immigration, the officer started flipping through my passport and counting entries. He looked genuinely confused and concerned. A lot of staring at the passport, then at me, then back at the passport.

I told him I’m on DTV. He said he knew, but didn’t seem confident. He turned around and asked another officer about my passport and the number of entries, then called over his supervisor.

From what I could understand, she immediately recognized it as DTV and explained that multiple entries are normal and expected. After a couple minutes, she said okay and walked away.

Even after that, the officer still seemed hesitant. He didn’t stamp my passport. He wrote the date in by hand instead. Before letting me through, he said something about “long stay” and “one year,” and then told me that next time I come back I’ll likely be interrogated or sent to secondary or tertiary screening.

That honestly caught me off guard. I’ve followed the rules exactly. No overstays, no border runs, no working locally, no Thai clients. I travel because I want to and because I can, not to game the system.

I’ve entered Thailand many times over the years and this was the first time I’ve ever had any issue at immig