I'm sorry I should have clarified. I was talking about reply alerts. Not reaction alerts.Not mine. They all seem to be when the reaction was made, as I could have 20 notifications for the same reply all mixed in with others. I would not think it matters that I'm on a desktop PC and using the web. I'm on the iPad so seldom I don't know if there's a difference.
Our internet is a turtle compared to what I've seen yours is too, so this is very weird.