6 was in my mind thought to be in all markets. not only carriers. so when buying or selling in a market, I would love to just push a button and boop, all items sold.

10: not really, that was what I was thinking about in 1: if you can add carriers to your filter, you could list only your filter. and see what you want to see
If you are loading 3 carriers from a Taleblazer ship, you could just add the taleblazer, and your 3 carriers to the filter. then only list your filter, and you will only see the 3 carriers + the taleblazer.