The title form "(page title) - (site name)" indicates that this is a title Google generated itself because it thinks the given title is not "good enough":
Google Search tries to determine if the element isn't accurately showing what a page is about. Google Search might modify the title link to better help users if it determines that the page title doesn't reflect the page content. For example:
Stuffed animals - Site Name
As for why they are misspelling the OpenWrt brand, Google's database might very well think that "OpenWrt" is correctly spelt "OpenWRT".
As with so many things Google it's basically a black box, and despite a horde of "SEO specialists" trying to tell and sell you otherwise, all "analysis" is conjecture. Google doesn't give out reliable ways to modify the search results, and they never will, because they can't. If you could directly and reliably manipulate search results it would risk jeopardizing their core product (search results) driving their moneymaker (adwords).
So if something wrong reaches a critical mass, then google is convinced that this is right.
If only enough websites state that 2+2=7, then google will show this to the whole world as true.
Brave new world. Tuttle or Buttle, who cares?