Yes...that is an exempt entry stamp good for 30 days.

Easy... happens fairly often.

The "1" doesn't look like a 1 to me, rather, the edge of the rubber stamp. But...what you choose to do is up to you. If you are planning on getting a 30 day extension, go to Immigration on Monday, get the stamp sorted out and your 30 day extension at the same time. Then kick your feet up and have a beer.

Should have been 16 November... IO screwup. Go to immigration office and they will correct it.

Fred provided some excellent advice and I had the same experience. They did require that I go to my consulate and get a signed and notarised photocopy of my passport before they would open me an account but, once I had that, it was a breeze.

The border point is open every day... so yes, you can go on Sunday.

You mentioned that you live in Equador. It may not be possible to apply for the 6 month multi-entry tourist visa there because you are not Ecuadorian. I recommend you call the consulate in Quito and see what they say: (+593) 2 2563-053 (+593) 2 2542-165. You might be limited to 60 day single entry tourist visas from that consulate (which you can extend additional 30 days in Thailand for 1900 baht)

That would limit your long term options to retirement visas (1 year or 10 year). Note that you might be able to get a letter from US Embassy in Thailand that allows you to get around the need for 800,000 baht in a Thai bank account. I'm not American so I can't say with certainty but I've heard many people do this. Hopefully someone can confirm/deny this and explain the requirements needed to get the letter.

There is the retirement visa (non-o) that are good for 1 year at a time. They require some proof of funds though. But if you're going to spend a lot of time here, it's your best option (IMHO).

Then you can go to Laos or Malaysia and apply for a 60 day tourist visa (single entry) that can also be extended at immigration by 30 days.

Apply for a 6 month multi entry tourist visa from your country of residence. If you time it right, you can get close to 9 months out of that visa (each entey gets you 60 days). You can extend the last entry by 30 days within thailand.