It could be that your anchors are picking up the wrong layer.
If you're just creating a new empty game object, dragging it in to the hierarchy and adding a UIAnchor, then your anchor object will end up on the default layer, and automatically pick up the 'Main Camera' object as its reference. In most people's cases this'll be wrong as they'll have their UI on a layer like 'GUI' or '2D'.
Check your UIAnchor objects layer and, if it's wrong, update it, then drag the UICamera for that UI over the anchor's 'UICamera' property.