Increasing Agent fees?

[Jessica Brennan]

I have been working with an agent for a few weeks now, purchased 2 SFs one for 120K and 1 for 40K, after closing on the second she informed me that she would now have a minimum commission of 2500, and that her commission was increasing from 6 to 7%. Has anyone had experience with this? She has been GREAT, however, I'm a little shocked at her email and feel like I need to find another agent.