If u r trying to join a game, view the player profile 1st because I think their are a lot of "dummy" matches. If it says Division 1 but when you check the person hasn't played any games then there is something wrong.
I check and if the user has played a few games I have nop problem connecting.
Very strange tho from a company like Konami to have these problems. They make enough money each year from PES to have some decent servers.