What the Trust Level badges signify is available.
If you go to the various Trust Level badges you can see
This badge is granted when you reach trust level …
That is, “when you reach” and not “when you are”
In other words, the granting of Trust Levels are more like “milestones” than “current level”, though the current level is the highest reached and Trust Level 3 should probably say “reach and maintain” as it can be un-granted.
In explaining that, I see it can be a bit confusing, can’t it?