From an explanation to someone else:
Don't get too hung up on stars, this is just a bit of fun based on the number of posts. There are different "Bands", the initial band goes from Spectator with 0 posts, to Captain with 100.
At 130 you join the second band (but at the bottom, hence 1 star). You're a Jester (1 star) between 130 and 159 posts, Touchline Member (2 stars) at 160, Club Member (3 stars) at 200, Premier member (4 stars) at 230 and Gold member (5 stars) at 260.
However at 300 you'll be in the next band as Academy Player (1 star) - and so it goes on while I can invent bands to put you all in. Currently it tops out at 850, but the highest we have is Deadly and Fearless Fred in the 500 postings bracket.
As I say, just a bit of fun so don't worry that you're back to 1 star. The alternative is to continue adding stars, so deadly and Fred would be on 17!