It seems that sub notifications aren't always alerted while streaming. It's happened off and on for the entire year+ that I've been streaming. Last night for example I had 3 subs but 1 of them didn't show. She let me know and showed me her status. I also checked my sub list and I see her on there and it says she subbed last night however I never got an alert about it. This is upsetting as I like to make a big deal when someone subbed and I would hate for them to think I don't care.