Maybe wait a bit because I read Thailand and UK are busy to arrange Thai can come visa exempt. Keep track of the news. And yes, marriage does not matter. They want her to go back to Thailand so you have to find a lot of reasons / prove , why...
This where answers on this partial thread where you started with the word "Wrong" as answer on the statement Vincent mentioned. It's not, but have a nice day with y'r bananas.
This I don't know, but I know some imm. offices accept it. You have double work to do though. 1st the bank statement that the missing money from y'r monthly international deposits was there already 2 months before y'r application and 2nd the statement of the 12 deposits.
And should you have a passport of a country for which you can have the 30 days visa exempt, I would not go on overstay 2 days. Should you be checked in those 2 days, you have a big problem. The (later) return ticket is most of the time a problem with your airliner. Not many times by Thai imm.
I cannot read Thai, but does it says somwhere these are international transfers ? Or is it proven by the 'international transfer' text in the bankbook.