Remove %3 and %7 from URL

[bangmaster]

I am receiving strange values in my URL, but I don't know what they mean. Values include %3 and %7. Can anyone assist? See attached.

[wclass]

That's URL encoding - URLs can't contain spaces or a range of other special characters, and so are replaced by a % and 2 hex characters.
For example, a space is converted to %20.
Looks like you have %3D and %7C there - you can look up the codes at w3schools (and many other places).
http://www.w3schools.com/tags/ref_urlencode.asp

[bangmaster]

Thank you, Margaret. I really appreciate it.

[paintedturtle]

Thank you, Margaret. I really appreciate it.

You might want to try ticking the "Replace Reserved Characters with underscores in filenames" box on the HTML5 Target properties dialog (see below).
~Sarah