Lost Collective Shop review for Searchanise Search & Filter

The app looked like a great solution to what I needed, but my experience has plagued me with problems. It messed up the arrangement of my collections. This was able to be fixed with forced reindexing. But then I added a new collection that showed not only the products in that collection but every single other product in my store. Again, fixed with reindexing, but why can't it just do this automatically? Now, that same collection contains no products at all. I am running around in circles and paying a small fortune for the privilege.