Can't get three images across a page in the same row.

Site URL: https://lancasterdemocrats.com/our-candidates-2022

I already have two columns on a page (image on left, text on right with many stacked) with a line block under the last set spanning the page. Below the line block, when I add an image, the image expands to the whole page (expected) but when I add another image block (which automatically inserts below the first image block) and I try to move it the right side of the first image to create a row, it inserts itself as a third column underneath a previous line block (the insert point in this case doesn't make sense, either, since it bypasses another line block further down the page but also not going all the up to the top of the page (what's special about this particular line block?).

How do I get three images across a page given this scenario. I can't find the answer in the Forum or Help. Additionally, I need to put text under the image (not necessarily a small caption but larger font indicating a web page link). I created a Gallery Block and got three images across but even though the edit box said I could put a caption and link under the image, they didn't appear. 

Using Brine/Impact v7.0

Thanks for helping,

Terry1121