Shoutbox

i dont know much about the way plus or messenger works but ive encountered something similar in the past. my error was say i got it showing on the top of messenger that i got say 80 emails i click it and i only had like 5 or 10, usually if i was to sign out of messenger and restart the program it fixed it.

however there is one other possibility. how did you close the first email? you see messenger only displays the amount of unread mail you have now if you viewed 1 email and then clicked delte whilst viewing the email it deletes the email your in but also shows the next message at which point you click mail or the inbox link and exit that way if that happened then your message is considered to have been read, to resolve this tick the box next to your email and then click on "mark mail as unread" and messenger will show up as having 1 new mail again.

alternatively if you exited the message you read by clicking mail or inbox then ticked the box and clicked delete your second message would of still been unread so it would then probably be the error i experienced with messenger not accurately reporting the mail correctly. i hope this helps.