Cant use more than one code...

I tried to use two codes, one for $1 off an AD breakfast sandwich and one for a stamp on my coffee card and was told I can only use one code per transaction. I could understand if I was trying to use more than one money saving code but I just wanted a stamp for my coffee also. And it will not give me a stamp on my coffee card if I get a meal with a coffee upgrade as a drink...

tress200 about McDonald's, v5.3.0