View New Posts opens new window

On my iPad and iPhone at least, the red "New Posts" link in each forum like "Road" opens a whole new window. Why is that? I just end up with loads of new windows open....
ROAD < Scott Foil HMX Di2, Volagi Liscio Di2, Jamis Renegade Elite Di2, Cube Reaction Race > ROUGH
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Desmond Tutu
I find this a little bit annoying.