This is a byproduct of unstructured learning. If there was was a unit called Suttas101 this sort of stuff would be laid out by a junior teacher. It wastes time for learners and knowers alike, but it definitely adds to the fun of learning. It’s less likely to be fun for those that do the mopping up tho, 
Thank you. 
I’d probably ask fewer naïve questions if I wasn’t after some sort of quid pro quo for moderating. 
Short by-lines under the title of such groupings might be a useful longterm aspiration; or longer titles like “Dhammapadas from non-EBT traditions”.