The unread messages bug is https://bugs.maemo.org/show_bug.cgi?id=6391 - this has been flagged as requiring a Brainstorm proposal though (and there doesn't appear to have been one created yet).

The delete message bug is https://bugs.maemo.org/show_bug.cgi?id=5417 - this has been tagged as fixed in PR1.2

In future, please try using the "Power Search" function (from the toolbar on the right) first, rather than relying on others to do this for you.