What visa did you come on for your first visit? I have entered Thailand well over 150 times since 2016, on visa exempt, non immigrant and DTV. Never been asked to prove funds. Before 2016, went through immigration 10ish times from 2005 to 2016
did they tell you it was for “wrong name” through? The auto fill is very glitchy and has a history of filling in wrong letters, like switch L and I. Best to delete the auto fill and reenter everything
Americans also have a second name that we call our middle name, which is almost never used except for formal paperwork. It is in my passport and therefore needs to be included. Did you not include it at all or is the question if it should be included under first name or middle name?