Pinning Network Files (Strange Behaviour)

Okay, so I was having some issues before with pinning network files to the explorer item on the taskbar.

I can now replicate the bug happening. I want to see if it's just my setup or windows 7, so I'd be much obliged if someone can test this out for me as well.

First Scenario

1) First map a network drive.

2) Pin it to the explorer item on the taskbar by dragging it there.

3) Open up the destiation through the jump list.

4) navigate a couple of folders down and open any file.

What you should get is the network drive is no longer pinned. However, the folder where the file you just opened resided has taken it's place.

Second Scenario

1) Navigate to a network destination through windows explorer (not a mapped drive)

2) Pin a Folder from that network destination by gragging to the taskbar.

3) Pin another folder than resides inside a folder in step 2

Result: Folder pinned in step 2 is replaced by folder pinned in step 3