Over at https://www.reddit.com/r/moto360/comments/3dumu3/does_anybody_else_have_trouble_selecting_all_in/ a few users have issues with not being able to tap a certain area of their Notification Mode panel. This seems to be related to WatchMaker, as the problem doesn't exist when a different watch face is active (one not by WatchMaker).
This image is a rough estimate of the dead zone: http://imgur.com/RwuNYxx
This affects the Notification Mode panel as well as the watch faces themselves.