I went in/out six times last year (staying for a few hours to switch airports, sometimes 2-3 days) because I used thailand as a hub while going to Indonesia and Myanmar and was let in without any questions every time
At one point I asked an officer if it could be a problem if i continued doing this and she mentioned they mainly look at how much time was spent IN thailand in total. as long as the amount of time spent IN thailand on excempts is nothing serious they wouldn't question it
