This is my first time round using Umbraco and I have created Document Types / Pages using the wrong naming format and now this has transpired into my page URL\'s, for instance <
You can apply on URL names in web.config:
In section find:
this will set url names for new created items to name.aspx
If you set this to 'true' then new items will be named like /name/
Additionaly you might want to avoid of Handling some urls by Umbraco pipline, just use this setting - add URLs which must be bypassed: