Problem purging emails from Gmail via Windows Live Mail

Hello all,

I access my gmail account through Windows Live Mail 2012 on an ASUS Laptop running Windows 7 Home Premium.

I've noticed that when I attempt to Empty the Trash Folder, I'm getting some messages re-appear in my Spam Folder. Over the last 12 months I've built up about a dozen messages that keep doing this. I believe they all originally arrived in my Spam folder, but not every message that arrives in my Spam folder behaves like this 12 or so do. What happens is as follows:

1. The message arrives in the Spam folder

2. I delete the message, and it moves to the Trash folder

3. When I empty the Trash folder, all messages disappear from there, but these 12 or so re-appear in my Spam folder.

I've deleted these messages dozens of times, but I can't seem to get rid of them permanently.

Any help appreciated

Ron