Unable to program minimum date as intended

I’m trying to program the minimum date to be 1.5 days out, however no matter what entry I use, it seems to max out at making the minimum date to be about 6 hours out. Right now the entry I have in the minimum date field is “+1 day 12 hours”, but I have tried other values like “+5 days”, and the most it ever seems to delay selectable times is by about 6 hours.

Thank you for your time and help!

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