Windows key passed to OS X AND remote session & Win-X not passed at all

In RDM Mac, if the keyboard is set to passthrough the Windows key, when a session has the focus, if a Mac Cmd-key combo, such as Cmd-Space, is entered, RDM also passes the Cmd key through. This is astonishingly annoying and has been this way for many releases. As you can see in the screenshot below, using the Mac keyboard to bring up Spotlight search while a session has the focus also passes (at least) the Cmd key to the session.

Plus, Windows-X (what you'd expect to be Cmd-X) isn't passed at all.

This really needs to be fixed or at least a passable workaround.

Thanks.