Publish-RsProject doesn't publish a project, it publish a directory

[MartinRyx]

The function Publish-RsProject has the following description:
This function deploys a full SSRS project to a Power BI Report Server

The problem is that the function publishes all reports in the same directory as the project file. If I make a copy of an .rdl-file, e. g. My Report - temp.rdl even that file is published to the server.

Suggestion
Read the .rptproj-file and publish only the reports included in the project (or change the name and description of the function)