dates fields from calculated table shown in a different way

[df123445]

I have a table with 2 date fields:

there are no null values in both fields.

I'm creating a calculated table with: 

Distinct recs= Summarize('main data', 'main data'[name],'main data'[FINAL EXP],'main data'[document_create_date])

but for some reason the fields are seen in a different way in the new "Distinct recs" table (I've renamed the fields):

both fields types look the same:

Anyone has seen this odd behaviour before?

TIA 

[df123445]

Thanks a lot 

[SamWiseOwl · Accepted solution]

Hi @df123445 

Are you meaning why does created not have the Auto Date/Time field generated?

If you have joined on this field to say a Calendar table that will have turned it off.

Blog on auto date/time

https://learn.microsoft.com/en-us/power-bi/transform-model/desktop-auto-date-time

Limitations

https://learn.microsoft.com/en-us/power-bi/guidance/auto-date-time