There's no need to include anyone's name in thread titles. The thread will still be seen regardless of whether names are present or not.
This was caused due to another live update being sent out to PS3 and 360 to make some adjustments to match making, in order to find games quicker.
If you quit out of MP, go into SP then go back into MP, that should ensure you have applied the update. Please ensure your friends are also doing this so to avoid the mismatch.
Thanks!