Jade Wang from Google's local business team announced in a Google Business Help thread that if you see new categories in your business listings, please refrain from updating them.
Jade explained there is a bug (don't be surprised) that they are working on fixing and if you edit those categories, it may cause more issues.
Jade wrote:
We've found a technical issue affecting some users that causes a handful of new categories are showing up in Places dashboards. We're working on a fix and will come back with an update when we can. Please do not edit these categories for now while we work on the issue. Please note that these categories do not show on the publicly-available listing.
So be warned. Jade has not yet said when it is safe to go in and editor those categories.
Forum discussion at Google Business Help.
