I am sure you are aware of the confusion/uncertainty brought about by the transition from Google Places to Google + Local. It has been a nightmare. And if you have seen your listing disappear/drop, you are patiently waiting for Google to roll out the changes that will see our listings restored. Beware. If you have used a local business service centre or mail box rental office to create an address in another location in order to spread your listings then that may be your downfall. There is mounting evidence to suggest that Google is blocking local listings for businesses using these business service centres and mail box addresses. This could be bad news for small businesses that have invested in renting mailboxes or office space with a view to using them for little more than establishing credibility within Google Local. http://www.consultancymarketing.co.uk/blog/google-places/ We are keeping an eye on this situation as (as I'm sure you know) this migration from Google Local to Google+ Local is FAR from complete.