I am having trouble with the default time dimension across my dashboard being synced up. I know Anaplan says a best practice is to select your page selectors at the top of the page no matter what so you know everything is synced, but realistically some aren't going to do this no matter how many times you tell them. Then they are confused when numbers don't match up.
Grids can default to the same time if you use a saved view and publish to a dashboard using that saved view. KPI cards don't seem to work that way though. In my experience they default to whatever the current period is no matter what.