Pin Help (itunes, safari)

when i pin itunes and safari at the bottom, they do not open like the rest,
instead of that icon being tabbed, it opens a new icon at the bottom which then gets tabbed, so i have 2 itunes at the bottom, or 2 safari icons.

is there a way to solve this?

Open up itunes and pin the active window.

Windows 7 Taskbar opens iTunes and instead of just lighting up the icon it creates a second to show its open? - Yahoo! Answers