I have my gmail app set to "sound on, notify once", and "notify for every message" unchecked. I also have all my inbox categories unchecked so I get all my emails in one inbox. Most of the time, I get only one notification until I open the app (as I would expect). However, sometimes I get another notification for new mail before I've looked at previous emails. Why am I getting these extra notifications?
I'm running android 4.1.2, gmail 4.5.2-714156, on an LG Spectrum 2.