CMS New thread on "vbcms comments" for every visit on article... even if it already exist
 

I've just upgraded my forum (http://foro.acuarios.es) is creating a new comment
threads for every visit on any article of the vbCMS, even if they already existed....

The forum is hidden but they show up in "What's New?" tab.

Two questions:

1) Is there any way of hiding those new threads on What's new?
2) What are they getting replicated many times? (I suppose that's not normal...)

Thanks!