Best approach to handle a date-time-short domain in a look-up column

Hey there,

I have recently encountered an error - which might seem like a bug - about a look-up column. 

In this case we have a sounding date which I would like to attach to a report. Therefore I would like to see the most recent time up until the seconds, which was also confirmed, by a third party. 

So the column itself has a control type - date, but in the GUI this will be set to varchar, which ends up like this

This is not the most charming. So I came up with a 2nd option, by adding a new column to this specific table with a varchar domain. 

Is there maybe a better approach not having the date-time-short domain converted to varchar?