The FL410 on flightaware is just the filed altitude. If you click on "track log" it shows you guys going up to 230.

I think it's a nice treat that the pilots did this. Especially these days where it seems like half the pilots are mad at management and seem to lack enthusiasm, you're lucky to have had a crew that nice. Too bad you didn't have a window seat, though

The guys up front have been known to do the same thing around Mt. Rainier on nice, clear days.