SebastianJu_alt, did you edited that post? Because the thread re-appeared in my "Show new replies to your posts"-list.
Nope it was me possibly, I tried a test and then deleted the post because of my mistake(forgot to include the thread in my watchlist of my alt 
)Oookay, here goes an edit
Edit 1: Either it works only after 5 min edit interval(possibly similar to edit notification of the post, the dotted line) or it doesn't at all. Didn't appear on my watchlist(alt's)
Edit 2: Aight here goes the 5 min interval edit. Also Mitchell, I think its something else(quite hard to explain) that you're talking about
Edit 3: Aand it didn't work