I've just hit the Tier points for Silver and my version of the app problems is Progress to Silver section shows:

- Tier Points: "No more needed"
- "2 of 4 flights needed"
but under the "or" section
- "4 of 50 eligible flights completed"

So there is a mismatch in what the system thinks of my eligible flight count.

However on the web page, it does say "You have achieved silver membership" but I just need the extra day or so before everything changes from bronze colour to silver colour.