For Sling, I think you need to contact them to see why the rate wasn't set at the discount (Sling does billing, not T-Mobile)
As for data, you'll need to contact T-Mobile directly to determine why Binge On isn't an option with your plan. Your best bet is to contact T-Force through Social Media: Contact Us
Hey there! I replied on your thread here - The specified item was not found. - and am going to go ahead and lock this post so that we can make sure we're looking at the right one for updates!