Page paths and location

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I am ready to launch a new design and move to C5 for a client. I want to map their old page paths to the new pages. My understanding of this is that all I should have to do is use the Page Paths and Location and enter in the old path under "More URLs".

When I enter in contact.htm and save, then return to that area, the URL has changed to /contacthtm. Why is it removing my "dot". I have Pretty URLs turned on.

What am I missing?

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