Save yourself the money and the headache and do it online only cost about 560 and after completion you set the interview date and in less than two weeks so all up a month I was able to get my wife her tourist visa
If you are getting an extension go off of the stamp not the visa if you are extending go tomorrow and get it done it 500 baht a day I overstayed 6 days
Ok man out side of this grammar and Thai lesson if you are trying to stay for 6 months source your accommodation 1st do everything the Thai embassy website suggest to get your visa and that’s it