I read the T & C and the thread above... My question: I have about $140 left from a partially used vol. bump ecv of $300. I was on a flight that was cancelled a few days ago with a mechanical problem and was issued a $25 discount (pk222). Can the ecv and the pk222 be used on the same flight and will I get all the normal eqm's, miles, and sewgments as if paid in full? can multiple pk222's be used on a single flight?

Thanks!