Anyone know why UOFiddler shows 'ghost' statics/tiles on a new blank map I created with UOLandscaper? I've confirmed both in game as well as with CentrED+ that no statics/tiles exist there but UOFiddler show anomalies like this in several spots.

You need to disable the .diff files from being used/shown on the map window. It can be done in the Settings>Options tab at the top left. Just uncheck "Use Map diff Files".

Edit: Alternatively you can delete those diff files entirely from your file directory if you aren't using them, or are using a custom map - it won't effect anything.