Am I allowed two border hops per calendar year in Thailand for visa exempt extensions?

I arrived last year in November with a thirty day exempt then got an extension. Did a border hop in January at Mae Sai and got another 30 days. Got an extension in Ranong last month with no problems. I am planning to do another border hop for another 30 day exempt in Ranong this time. I just want to be sure that it will be okay and confirm that I am allowed two border hops per CALENDAR year. I do realize it is up to the discretion of the official, but wonder if anyone has had issues with doing three in a row like this. Thanks in advance!