Get different prices almost every time I go

Do employees not get trained on chicken 3 pointers? I get the same thing every time I go which is just a bowl with rice and chicken and literally nothing else...just 2 things.

Sometimes I get rung up for a chicken 3 pointer and it is like $5.50, sometimes, the person hands off to the cashier and tells them it is a chicken 3 pointer, I get charge full price of almost $11, and sometimes it is somewhere in the middle.

It's like some employees know that it should be cheaper and others don't. I never say anything, but it is very annoying going in and not knowing whether you are going to be charged the correct price.