Lee,
I agree with Drew When you look at your REST service directory page you have several map services listed as cached but if you look at them they do not have tile info information. Take your 2 Aerials map services. the one that says AerialsCahed has not tile info but the on that is just Aerials does...? All you other services with cached in their name do not have tile info data. If you are sure that these services were cached then try a server reboot. Check that there are folder in the ArcGISCache folder that are named your cached map services names and that they have sub folders that are like Layers\_alllayers\L01 and have images in them.