Thanks for your response, but I respectfully disagree with it. I had 5 gift certificates totaling $9.80 cents, which were indeed merged as you said - and thank you for that. But in addition to those there was also a Rewards certificate (only 13 days old) which has disappeared since I started this thread last night. I have been told previously on this forum that Rewards certificates cannot be merged with gift certificates, and I'm pretty sure they don't expire in 13 days, do they?

So I'm back to asking what happened to the Rewards certificate? I appreciate your assistance.