Rewrite Link logic bugged

[davidlevy247]

I am using the Microsoft version of this for WordPress Multisite on WAMP for windows 10.
After much trial and error, I got the plugin working to render a site however when using the rewrite link processing options I discovered a lot of bugs and issues.
The following is one of the bugs in the rewrite link logic.

When rewriting something like
X\Y\Z\CSS\ASSETS to \CSS
The rendered link output will be \CSS\ASSETS rather than just \CSS\ as instructed
Whenever there is a single target folder having the exact same name as one of the source folders in the source directory tree,
I see problems like this.