The site_node_apm_integration namespace has about four procs in it, are these used elsewhere? It looks like the intent was to provide all mounting/deletion facilities there. It seems that this functionality should just be part of the site_node namespace. If the site_node namespace doesn't provide that functionality perhaps it should be moved over from site_node_apm_integration?
Whether you move proc #2 or proc #3 over doesn't much matter since they essentially are doing the same thing (the cache appears to be updated by proc #3 despite the lack of an explicit call to do so).
If you have time to clean these namespaces up and make things more consistent, in addition to simply fixing stuff as you're doing, it would be *greatly* appreciated!
