Hi Christina - did you recently make the move to Adobe Console? If so, this is the navigation once you migrate. 

We do this in our instance in a similar setup to Katherine and you align them by Key. There use to be a really good article on experience league about this but I just searched and couldn't find what I read previously.   Some considerations.   Only one object can use the Key. So, if you have multiple...

If they have manage access you can't limit their ability to move the dates.   Options You could create a view that only has the date fields visible but formatted so they can't edit directly from that project view. They could still go into the task and edit the dates but you could try limiting it on ...

If you have a column for planned completion date on your report you should be able to sort through the native functionality.     However, if you want to sort by planned completion date without having it as a column (like you did with the above scenario) you should be able to add this to to another ...

Just found an idea we could vote up https://experienceleaguecommunities.adobe.com/t5/workfront-ideas/new-workfront-form-builder-removes-ability-to-quot-track-field/idi-p/687870

I remember reading about this somewhere that it's being removed from the form designer and is only available from where Katherine mentions. 

I would double check that tasks and issues are in fact delegated. Using the delegation in the "calendar" area only delegates approvals. So delegate tasks and issues you have to do that from Home but it can only be done in the old home currently and not the new home experience.    https://experienc...

As Doug mentions you have to change it to a valueexpression instead of valuefield and it will display the values instead of the labels. 

Can you post a photo of what they are seeing?

Out of the box that's really the only way to notify a user of something like that.