Agreed...I don't think the DTV is considered A tourist visa...but kind of similar to a tourist visa. Nevertheless, until they figure out exactly what a DTV is, this kind of confusion will continue and banks will likely refuse accounts to DTV holders, especially considering the ongoing scam center/fraud crackdown, which will likely continue for years to come.
Good to know, but I always knew that as long as you were not returning the same day (or if you came by car, thus being in the car lane) you wouldn't even be questioned.
However, it is also re-assuring that those on DTVs who may want or need to re-enter the same day can do so...
The first time you entered, you came by bus through the Aranyaprathet-Poipet border, hence the slight scrutiny. When the border was open, I also re-entered through there once, but by car (which is different). If you use public transportation, the upstairs immigration is known for being strict. Any other border is usually OK.