Enterprise Wiki with metadata navigation is showing many errors and problems

I am trying to create an Enterprise Wiki which have a metadata navigation and filtering, I thought the requirement is straight forward in SharePoint 2013, but I have fall into a number of problems and bugs:-

1. First of all I have enabled the “Metadata Navigation and Filtering” service on the site level.
2. I define the intended Term store from “Term Store Management”.
3. Then from the “Metadata navigation settings  ” at the library level I define navigation using wiki Category.
4. Then I have linked the Wiki Category site Colum to use the term store.
5. The first problem is that the metadata navigation did not show up so I had to manually add a reference to the navigation using the SharePoint designer and I have edited the page layout.

       -I Put this markup in the beginning of the page

<%@ Register TagPrefix="wssuc" TagName="MetadataNavTree" src="~/_controltemplates/MetadataNavTree.ascx" %>

       -I Put this code in the end of page’s code, after the next </asp:Content> tag

<asp:Content id="Content1" runat="server" contentplaceholderid="PlaceHolderLeftActions"><wssuc:MetadataNavTree id="mdnt" runat="server" /></asp:Content>

But now I fall into these two problems:--  

1. The metadata navigation tree will not be shown to contributor or reader users; only site administrator is able to see it.
2. When I click on any term inside the navigation tree it will always redirect to home page, instead of showing the wiki pages that are associated with this term.

Any idea of how to solve these problems?

BR

-::::- I think it worth mentioning that the generated URLs when clicking on a term in the term tree looks like (this URL will display the home page):-

http://win-spdev:2013/90/test/s1/Pages/Home.aspx? TreeField= Wiki%5Fx0020%5FPage%5Fx0020%5FCategories& TreeValue=60447f93%2Da217%2D4adf%2D9608%2D1f742fec06d5.

http://win-spdev:2013/90/test/s1/_layouts/15/Categories.aspx?FieldName=Wiki%5Fx0020%5FPage%5Fx0020%5FCategories&FieldValue=60447f93%2Da217%2D4adf%2D9608%2D1f742fec06d5&ListId=4be8cbd4%2D3beb%2D4488%2D8cee%2D02831543e1fa