Donation Center taking too much Plasma?

27 Year Male. Started donating Plasma 1 Year ago at BioLife when I was 5'9 235 and was donating About 900 ML of Plasma. I am now 205 Pounds and am donating about 1080ML when I asked the person hooking me up why they are taking more even though im 30 Pounds lighter they couldn't answer my question but 1080ML Seems like way too much.