That's factually wrong. Only top 100 of each dungeon counts. And top need waaaaay more than 15 to appear at the end of the week.
On my servers your run pretty much doesn't count under 19-20.
FACTUAL PROOF HERE feel free to switch between dungeons. Most are 20 minimum, a few 19.
Either you need to push really high keys for your score to improve. Or you must cherry pick someone in the LFG from a dead server to make top 100 of his server.
I really have nothing against raider.io but Blizzard really need to step up their API for BfA, top 100 way to limiting. Weekly dungeon should just be backedd in the API for every character's armory.