Might be an idea just to have them added once. Are you sure you're pressing the Apply button? You can see the Apply button can't you? Sometimes it's obscured & you need to drag the window down.

If still doesn't work, perhaps your prefs are corrupted. Make a record of all your settings & then delete your prefs. Delete them by going to C:/Documents And Settings/your_username/.limewire & trashing the folder called .limewire But you'll need to re-add all your settings again if you do this.

For searching, go to LW's menu Tools-Options & Searching & Limit. You can type in the no. of simultaneous searches there. Simultaneous means as it suggests, how many you do at the same time. It doesn't matter how many previous search results you already have up. But keep in mind search results go stale after a while & also keeping many previous searches up may use up more ram.