I've done a little editing in my BibleWorks maps module, so this may be my problem, but I think Jericho is quite a bit off in placement. It now appears to be rather close to Jerusalem just off to the east rather than farther east and just north of the Dead Sea.
It's properties now locate it at: 31.800000 N and 35.300000 E
If Google Earth is accurate (and it appears so), you can locate the tell exactly at: 31.870728 N and 35.443865 E
These coordinates do set Jericho correctly north of the Dead Sea.
If this mislocation is not the result of some previous bad editing I did, then it should be noted as a needed correction. Perhaps this thread can be used to list other corrections people find.
BTW, if you haven't tried out Google Earth (free download), it is way cool. Type in 31.870728 N 35.443865 E in the search and zoom in to see the Jericho tell. Or check out Capernaum at 32.880918° N 35.575591° E