lykes2fly, I'm going in to CW to try the same switch next week. May I ask, exactly what kind of bank statement did you present, your original bank book and copies, as we normally give at Immigration, or an official stamped paper statement from the bank. Bangkok Bank takes a week to provide an official, stamped and signed annual statement.
Also, did the IO ask for proof of the exact source of your monthly remittances, as in a letter from US SSI, or was he satisfied that the credit advice showed they were FTT (from America)?