After installing SCCM 2012 R2 SP1, if either value for Software available time OR Installation deadline is greater than a single digit (>9), the ADR properly sets the deployment schedule but then truncates the far right digits and re-saves the ADR. For example, let's say you have an ADR schedule set to become Available 12 hours after the rule is run and has an Installation deadline 24 hours after that. After the ADR runs, you will notice the availability is chopped down to 1 and the deadline is chopped down to 2. I have tested using other values like 58 hours and the value is trimmed to 5. I've even tested with 3 digit values using a deadline of 154 hours and after the ADR runs, sets the value back to 1. This happens whether you use hours, days, weeks or months.   

That's already known, but I cannot find the thread right now.
Edit: here it is: https://social.technet.microsoft.com/Forums/en-US/30f8c313-7974-4c74-9865-f2b5a32ae10b/sccm-2012-r2-sp1-adr-deployment-schedule-bug?forum=configmanagerse

Hi,

that is a known issue with SP1 :-(

Here is a thread on the topic. https://social.technet.microsoft.com/Forums/en-US/30f8c313-7974-4c74-9865-f2b5a32ae10b/sccm-2012-r2-sp1-adr-deployment-schedule-bug?forum=configmanagersecurity

It is reported on Connect so you can vote it up and you can create a support ticket to Microsoft but right now there is no solution.. :-(

Regards,
Jrgen

Support case opened and votes are in.  I guess I should have searched the forum before creating a new thread. :)