Ran into the same issues w/ my office pool. We finally found a good one that allows editing and joining leagues: https://www.fotmob.com/wc2018/competition
If you're on Android you can use this app to track your objectives but it also lets you set reminders. So you'll get a push notification a set time before the objective expires, for instance 12 or 24 hours before. https://play.google.com/store/apps/details?id=org.mappledev.FUTObjectiveBuddy