inspect your page, by right clicking on the links you want not underlined, and clicking inspect, see what is going on, perhaps post a screenshot or link so we/i can help more? Otherwise, try playing around in the inspector to get it doing what you want and then transition those changes to your rapidweaver file.
In the sidebar, the bio is where I’m having trouble. Under the picture should be a single paragraph with three links, but as you can see, the text decorations are messing up the formatting.
That worked! Turning to 0px only eliminated the line, not the spacing. So I deleted the whole reference (.page-blog–sidebar a{border-bottom:0px solid rgba(0,0,0,0.1);display:inline-block;width:100%;padding:0.5rem 0}) and all now appears as expected.