Yeah - that is the way our date/time widget works. There is a "default" Date in the form designer and an "alternative" date - and it is the "alternative" date that gives the problem. Change it to "default" and you will get rid of the problem - but you cannot avoid displaying the time as the "Show time" is grayed out.
So you cannot have the "never" check box if you also want to display only dates - btw be aware that if you use "alternative" date the time is set to 12:00 UTC (which is wracking havoc if you are doing life cycle management based on whole dates). Is this good ? No - but I believe there is already some RFEs/IDEAS trying to get this resolved - so either find these or raise a new...
For accounts you can do a work around by providing a policy that ensure that date attribute is provisioned correctly - but that works only for owned accounts (not a big problem as orphaned accounts are not editable) but it may be a rather set of policies to create/maintain if the rules around the dates are not simple....
HTH