Unilimited and More Premium/HBO/UVerse

Ok where do I begin. I’ll begin with UVerse. I had the U450 package because of a sports channel that’s only in U450. I wasn’t aware there was an add on sports package with the channel I wanted. I always asked but told there wasn’t and would have to get the Spanish ade on to get the sports channel (beIN sports) if downgraded. So I recently moved into a new house in July and an AT&T rep came by. I had Sprint for wireless at the time so he tried to sell me on switching, which I had been thinking about for awhile since I wanted to lower my UVerse bill. I told him my plight about the sports channel that I watch that wasn’t apart of U300. He called and asked and it turns out there is a sports package add on. So once I was told that I downgraded to U300 and switched my wireless so I could choose HBO since U300 only has showtime and Starz (which i watch) but no HBO and I could care less about Cinemax. 

Now here comes the question.

After I switched to U300 HBO was no longer available, obviously. When I went to the channel I saw an ! Icon and a message saying you are not subscribed to this channel which is what I expected. I have a smart TV downloaded the ATT WatchTV app logged in and boom I got HBO no big deal. But I would say in the past 3 weeks HBO has reappeared on my UVerse TV guide. I can see all the HBO channels. I checked to see if maybe there’s some free HBO promotion going on but I couldn’t find anything and like I said it’s been about 3 weeks since I noticed this so I don’t think promotions last that long. I checked Cinemax to make sure I was still unsubscribed which I am which is what I expected and just to make sure I wasn’t put back in the U450.

Ok now the question: so since I have the unlimited and more premium plan and I chose HBO, did that carry over and reactivate HBO in my uverse channels?

Can anyone else who choose like HBO Cinemax Showtime or STARZ etc...and don't have it in their uverse tv package, see the tv network you choose listed in your channels?

I’m not complaining by any means I’m just wondering if this is how it is suppose to be. I just wasn’t expecting to see HBO available in my uverse channels I thought I would have to stream it to watch it.