Sent PMs not showing up

[Toadlover]

I sent a pm to someone and it never showed up in my sent box, so I sent it again and it still didn't show up so I sent it to myself and it showed up in my inbox but not my sent box. What's going on? Is this person going to get two messages from me or none?

 

[mevelandry]

I've experienced the same problem tonight!