Blackberry CURVE 9300 - V 6.0 User Manual page 106

User Guide
The number of new or unopened messages is different than I expect
The number of new or unopened messages includes saved messages and filed messages.
If you have set your BlackBerry® device to hide filed messages and you receive a new message from an email folder in the email application
on your computer other than your inbox, your device files the message.
Related topics
View filed messages, 63
104
Messages