Micros 2700 v5.3 can i give multiple discounts on one ticket?

I have customers carrying cards that are good for various discounts. 5,15,30, or 50% off. The discount is only applied to the cardholder’s meal. So if multiple discounts are needed at one table, I have to ring seperate tickets and add them together later, which is a pain for the servers. I am trying to figure out a way to make the discount only apply to the previous item, or that seat number. Right now any discount after the first one just keeps compounding. Is it possible to set up another tender like a house account or comp, but that can be a percentage, not a dollar amount? any input would be greatly appreciated.