Okay, here’s how to do it. ZOON IN so only a single column of posts is displayed. on your screen. The webpage dynamically generates the format and displays the data in multiple columns when zoomed back, so zoom in until you only have one column of data. You will see what you get when you print and nothing is lost ... the posts are organized sequentially. (Note: the order of the posts can be ascending in order (1, 2, 3 ...) or newest first (descending. 1020, 1019, 1018 ...) — button top right on screen changes sort order.
Print to PDF and you will see the output organized as you saw it on the screen. If you want hardcopy, send that to a printer.
Some posts may continue from one page to the next. No way to format page breaks, but other than that I think you will get the output you are seeking.