If your with a cdma carrier you should put it on GPS only. The cell location capabilty currently only works with GSM carriers.
Basically what that is doing is telling Berryweather which one to pull location from 1st and then which one to fall back on if the 1st one fails.
If you want the GPS/current location to show on homescreen icon set it as home. It will update as you travel.
Posted from my CrackBerry at wapforums.crackberry.com