Summer semester financial aid

Hello, I have a question regarding summer semester financial aid amount for federal pell grant. I first added 3 units 7-8 weeks ago and the amount on financial aid correctly showed. Later I added 3 more units which was 4-5 weeks ago. But there wasn’t any change to the amount. I am currently in both of these classes. When I called financial aid office last time, they said to just wait. When I called today, they were saying the amount I see is the most up to date and I am receiving less because it’s my first semester here and I only get to have leftover from last college (transferred from a csu). I don’t understand what is right.