RTCZero and running past 24 hours

I have scoured the Internet and I don't see anyone having this problem. I have seen past issues where the library was giving strange results and jumping around. My issue: I may be missing something here, but doesn't MKR1000 have a built-in RTC? Using latest RTCZero library and running sample sketch (simpleRTC.ino) has the clock running/reporting past 24 hours! Isn't there something in the library which says 'if past 24 hours to start again at 1'? Am I supposed to do that in my code (like I hear I am supposed to add my own 12 hour formatting code because that was dropped from the library)?

Example from monitor:

08/07/18 24:59:44
08/07/18 24:59:46
08/07/18 24:59:48
08/07/18 24:59:50
08/07/18 24:59:52
08/07/18 24:59:54
08/07/18 24:59:57
08/07/18 24:59:59
08/07/18 25:00:01
08/07/18 25:00:03
08/07/18 25:00:05
08/07/18 25:00:07
08/07/18 25:00:09
08/07/18 25:00:11
08/07/18 25:00:13
08/07/18 25:00:15

I have it skipping 2 seconds (delay(2000)). This seems to be acting more like a timer rather reporting time.

Seeing the same bug here on CREATE with carry over rather than increment the date and resetting the clock.

It does appear to be a bug.

Opened an issue for it HERE