Missing notifications settings?

[PokemonMillennium]

Hi everyone. A couple of our members reached to us regarding some problems with notifications

1. The first member isn't receiving a "bell" notification for their private messages anymore, just the one on the mailbox. Do you know how to change this? I checked in one of our "test" accounts and despite the settings being the same, the test account receives the bell notification for PMs.
2. The second member is receiving notifications for status updates from people she follows despite her "Followed Content" check being unchecked. 

Any help? Our IPB version is 4.5.4.2 🙂 

[PokemonMillennium]

Can anyone help us? 😞 

The secondo member has reached out to us again reporting automatic and spontaneous changes to notification settings