Why doesn't my calendar update when I update it on my mobile device?

There are two ways to update your calendar: on a computer or on your mobile app. Whenever I update my calendar on my phone, and then I go to my profile on my computer, it says "Calendar updated 3 months ago" on the computer site (or however much time its been since I've updated the calendar on my computer). Shouldn't the computer website be updated whenever the mobile app is? Now it looks like I'm inactive on the app to customers using a computer to shop sitters.