I don't use Wireless on my laptop, but assuming Windows 7 Wireless Network List is relative to Windows XPs, I may be able to help.
- Right click the Network Icon in your system tray
- Click "Open Network and Sharing Center"
- In the left pane, click "Manage Wireless Networks"
- Select each object in the list presented and click "Remove"
- Restart your computer, and reconnect to your network.
- If things went as I assume they should have, the number suffix SHOULD reset.
Hope this helps.