I did same at the same border, after 350+days here, I was vientiane for 15minutes. The IO was laughing and telling me I have DTV so i can stay long time :)
I was asked for latest payslips after providing the bank statements... they do it for several reasons i suppose, one being to see if they match whats on the statement (in my case, workcation, maybe to see if i really work for the company)... DTV is destination thailand visa :)