I’m currently not in Thailand so I can’t confirm that’s the practice that’s currently happening but that’s what they’ve said will happen. In a couple of weeks I can confirm for sure but let’s see the comments on here to see what’s playing out.
Not sure about the policy of the Hong Kong consulate at to whether they’d need to show residence from Hong Kong before applying. Others may know. Plenty of other options in local embassy’s and consulates around Asia like Laos, Cambodia, Vietnam etc. No need to go to the UK.
You have never gotten a tourist visa for 90 days. You may have had a Non immigrant O for 90 days or had a tourist visa for 60 days and extended to 90 days.
You’ve definitely got some wires crossed here. A tourist visa would get you a stamp for 60 days although I suspect you didn’t have a visa and got stamped in for free for 60 days. Either way you can get a 30 day extension at a local immigration office.
You can apply for a Non O visa based off of being married to a Thai national prior to coming (and get 90 days on arrival) or most offices can convert a visa exempt entry (or tourist visa) to an in country Non O - but check yours can - some can’t.
An entry stamp for a visa exempt entry is for 60 days, not 30