What are the dress code requirements for submitting a visa application at Jomtien Immigration Office?

Had an interesting experience at Jomtien Immigration Office this morning. I was there applying for my yearly extension of stay based on marriage. Handed over the wad of paperwork to the lady at desk 6 that deals with Thai family. After checking all the financials and marriage documents she homes in on the family photos. She spoke to my wife and returned all the documents and rejected our application. Apparently my wife was inappropriately dressed for a visa application in the photos. We were both wearing shorts and T-shirts. All three previous extensions had been granted with the exact same photos. So we had to return to our condo and get a fresh set of photos taken and printed and then back to Immigration to resubmit our application. Eventually we walked out of the Office at 1pm with the under consideration stamp in my passport. The Immigration Officer who rejected the photos was the same Officer who had previously accepted them. Go figure....