Hello Cindy,
when using some characters like & in the {{DISPLAYTITLE}} parser function, they will be replaced by their corresponding HTML entity.
Steps to reproduce: Create any page with something like:
{{DISPLAYTITLE:Web & Wine}}
Go to SMW Browse Properties, or select the page via ASK query. The resulting link will be correct, but the page name will be:
Web & Wine
I guess this has to do with the displaytitle parser function of MW itself.
We're using MW 1.25 and SMW 2.4