Flash movie stays after back button (??)

[wownflutter]

I have flash movies staying visible even when the a new page is resolving.

I used SWFObject

Here is the site (http://www.tentoe.com).
Go to OurSolutions...and then select "Interactive Gallery"

Then hit the back button of an IE browser on pc.

What is causing this doubling up?

Thx in advance.

wnf