Sky Priority Boarding question

Yesterday while returning home on a business trip from India via ATL, the KLM gate agents called for boarding. Pre-boards were first, followed by BE. Then something strange I had never experienced. They called for Sky Priority rows 10-14 only. I asked one of the GA's about this and I was told it was new. After the first call for SkyPrority, then the rest of Sky Priority was called to board. I am suspecting some Shena is involved here.

Any body else had this happen?