Help with Indigo theme for FrameMaker 2019

I am using the Indigo Responsive theme for html5 publishing from FrameMaker 2019. I have some trouble though...
1: I get different icons for topics. But why? I can't see any pattern as to why FrameMaker chooses different icons for the topics.
2: I was hoping to find a place to edit the text "Welcome to our help center" somewhere, but can't. It is there in the html files somewhere, ofcourse, but one would think there was an editor somewhere in the publishing process, but I can't seem to find it.
Can anybody help me out here?

