Whenever I use the SCO, it always goes nuts on the 3rd like coupon. Somebody always comes over and says "You can only use 2, save the rest for later". It sucks coming from Pittsburgh where I could use as many as I wanted at SCO.
Oh well. Kroger gets more of my business now anyways.
If you really want to press the issue at the SCO, then say you would like for them to key in the others. This is what they are supposed to do.
If you're comfortable doing so and find it worth your effort, go up the ladder and ask for the manager on duty, then the store manager and then corporate if need to receive proper service at the SCO. Either they are not trained properly, have weird rule as a independent store, or just don't want to be bothered.