iPhone App and Website not synching in timely fashion

I have rides from today that are on my iPhone app My Trips tab, but don't show up on the website in View Past Rides. Rides logged on the website using "Create a new Ride" don't show in the iPhone My Trips tab. Very confusing.

Why don't they sync properly? This is from rides taken 3 1/2 hours ago and 8 hours ago, so it's not like it's recent ride activity.