I have a task I tried to complete on the DoIt webapp earlier this week that won't go away. I've tried completing it, deleting it, editing it, etc. and it still shows up in its original form without any changes, whenever I refresh the page. It does not show up on the Android version of DoIt. The name of the task is "Complete the 20 practice questions on chalk" and it is in my 'Today' section. Any ideas?