... as asked above, could you please save down your SKP-file? This also enables users of older versions (like me) to help because not everyone has the current version. Sreenshots you can post as jpg directly visible here instead of making pdf files which have to be downloaded first which makes looking so cumbersome.
And if you take a new screenshot, it doesn't hurt to highlight the places that bother you (the example-jpg below is screenshoted with the free Greenshot tool).
I still don't see where the problem is. The pure presence of hidden geometry in itself is nothing unusual but normal. I can't be more specific without having a skp.
[the only indication that immediately strikes me is the tube shape, which appears to be segmented into an absurdly high number of circular segments]
SketchUp_Version.jpg
example.jpg