I posted an answer to your request to filter out the start page million post thing they're doing, but then realized you may not see it there.
I spent over 2 hours trying to find a way to get that off my start page. You can filter it out, but it comes right back the next time you go to the page. I even asked if there is an opt out, and got no answer. The filter at the top will let you filter to only your posts, or friends posts, etc., but like I said, it doesn't save the filter. All of it is back on my start page every time I change pages.
Isn't it funny how we can get hooked on our Spark points? LOL Now I'm trying desperately to get to the next level. Wish I had that much determination to get to my goal weight. Ha, ha! 244 days ago