I have noticed that there are a number of tasks that I will check off as complete on the web, but they are still showing up on my iOS app.
Are you updated to the latest version of our app? Which version of iOS are you running? Please try logging out of the app and back in again.
App version 8.0.2
iOS version up to date at 7.0.4
Logging out and then logging back in ended up working...thanks!