RNAV approaches normally list several approach minimums to ensure as many aircraft as possible can fly the approach and provide operational flexibility if WAAS becomes unavailable.

Airports may have multiple RNAV (GPS) approaches (e.g., Y and Z) to the same runway, often catering to different aircraft types and capabilities. The approaches may have different minimum weather ...

I flew four different RNAV approaches, including the one flown by the Facebook poster, and received consistent results for all four approaches.