Your experience is not unusual. Basically, it’s up to the Immigration Agent if you breeze through or have show a return ticket and where you are staying - but it’s very rare. Enjoy I’ll arrive there in 2 more weeks for 90 days for the 27th time.
I’m going to Bkk 29 November for 3 months. Looking at the wording you provided it does not specifically say the government pension must be deposited directly to your Thailand bank account. It seems one can just provide proof of a pension equal to or exceeding 65,000 TB a month. With that said, if I decide to relocate there I’ll probably have my pension sent directly to the Bangkok Bank in New York City just to avoid a hassle. Tks Mitchell.