There are very few cruises that fepart and eturn to 'Bangkok', that's even if you could,say Lan Chabang was Bangkok 🤷♂️ we did a cruise last year that started in Hong Kong, called into a few places in Vietnam, a couple Thailand and finished in Singapore. Well worth checking it out. There are also a few short cruises, 3-5 night, that depart Singapore but return to Singapore
if you don't agree with a group, why are tou in it? 🤷♂️ There are extremely knowledgeable people here who do give the correct answers provided they have all the information. Then there are those that think they know, who should learn when they are corrected. Some don't learn 🤷♂️ But this is an advice group, and when advice is asked, either you know and give that advice or just whizz on past 🤷♂️
Sounds like your mixing up your visa is valid dates with you actually entry stamp. I'll assume its a tourist visa, which is valid for 90 days, meaning tou have to enter withing that time frame. You then get stamped in for 60 days which be extended 1 time for an additional 30 days.