UPDATE: I spoke with another Google rep today about a separate issue but asked about Disabled/Pending listings. She told me the same thing the previous rep told me but went into more detail. She stated that this is a new tactic Google is using in order to combat the rampant spammers who attempt to take control of G+ listings or make fake listings.
What the Google team does is make sure the business website, Google Plus page and any Search items are exactly the same for each listing. If the website has a phone number ending in 5432 but the G+ page has a number ending in 5431, the listing is marked as spam and goes under a manual review. Once the spam team reviews the listing, it can be reinstated if the information is corrected.
This is welcomed news and shows how serious Google is about getting information 100% correct all the time. Again this is a brand new tactic and seems to be working well, although it is a pain for those of us in the bulk feeds. At least we will know if our information needs to be corrected and why. Just make sure your business information matches exactly everywhere it is listed!
Original Post: Those of us who frequently spend time in the Google My Business Dashboard know of its issues all too well. While the support Google provides for GMB is much appreciated, it leaves something to be desired. Phone support is shoddy at best and there are continuous issues with listings which confuse us all.