Problems sending PMs

[sinto607276]

Click on My messages tab and click read message

Yes, logged in but it says 1 new message, when I go there, can't see any unread messages and even tried to delete older conversations with people and I can't do that either :-(
I've got used to it and just think it's a wee glitch, I'm not that bothered about it.
Don't know if it makes any difference but I use a smartphone, not a computer.