Am I invisible?

I walk in to Mac Donalds Crossings Nelspruit, wait in line to be served the lady behind the counter named Precious decides to call the lady behind me to take her order, I didn't understand what was happening as I was first in the line and why she decided to call the lady behind me. I just think they must get their story straight because I don't know why. I just walked out cause I was ****ed off. Sharing my experience it friends I hear I am not the only one who's had this experience