1. you can't remove skype icons from notification-applet, there is no way to that right now
1- I've got a launcher on the notifications-applet, but I have another icon on the panel... How can I remove it?
2- if I close skype with X it will resize as icon, but if I click in the icon of the notifications-applet it will launch another instance of the program...it shouldn't restore the full screen window?
2. you can solve this issue by downloading this skype API plugin from here, which will allow only one skype instance
and then if you use nitify-OSD scripts posted in this thread you need to write bash script to exicute all of them in some order.
hope this helps