Ok, here is what I have done.

I have tried opening it using the /cleanviews option and it does not make an
difference.

I have looked in all my folder and opened anything that had a + beside it.
Yes, it does show an exact copy of the file structure (ie. all the same
folders, etc.) that is shown in the main personal file, but they also show
the exact same content.

I have checked the font colors and the are not white or any other color
option that might make the harder to see. I can not highlight anything above
the visible top message in my inbox, even though using the search all
function it shows that I have well over 200 unread emails above it.