I think that this is the same thing how it was with @steemsports and @ozchartart. If you post 4 times a day, your all posts are trending and you are not the only person here on Steemit. I admit you are doing a great job, but what is too much is too much. Plus people are using their SP how they want and I don't see how can you stop that. I think that @smooth noticed that and this might be the reason why he downvotes​ your posts. And @berniesanders already told you why he downvotes your posts. I think the best you can do is just go over it and keep doing what you know better.