Mail Merge Issues On Mac

Using OSx 10.9.5 on MacBook Pro.

I'm using MS Word and Excel (Office for Mac 2011) to do a mail merge on labels. I've done this many times in the past, but this time, it's not working. I go through all the steps, and my result is a document made up of addresses I didn't choose. I've checked and rechecked to make sure I'm choosing the correct excel doc, and I've opened it and saved it under a different name. Doesn't matter; my labels are still addresses from a doc I didn't select. I've never run into this before and it's driving me crazy. There must be something in Word that's remembering labels I did in the past. How do I clear this "memory"?