Lock Screen Notifications

[Thursday0901]

So I've downloaded the Windows 10 preview for phones and it's looking pretty good, if a little jerky on some things. One problem I have though is that some apps (including my text messages app, Facebook messenger, and all my email accounts) do not show up in the menu for picking your five lock screen notifications. Is there a workaround or fix for this as these are the apps I like to have notifications for at a glance. Thanks!