Sharepoint 2013 Defect in Remove-SPWebApplication?

Hi, 

I executed this powerShell Commandlet 

Get-SPWebApplication | %{Remove-SPWebApplication $_ -DeleteIISSite -RemoveContentDatabases -C
onfirm:$false}

As you can see it executed without any errors

On the machine where I executed this. If I go into C:\inetpub\wwwroot\wss\VirtualDirectories I see only 1 directory which belongs to the central admin. Very good.

But on all other machines if i go into C:\inetpub\wwwroot\wss\VirtualDirectories

I can see this

Why did it not cleanly remove all directories? The sites**** directories are clearly the sharepoint web applications which I dad created.

Defect?

val it: unit=()