Returns being accepted before they are created?

As a user of TaxWise Desktop version who sometimes receives strange acknowledgement reports, I carefully save and later look at the Ack reports.

Imagine my surprise when I noticed last week that some of the returns created on Sat Feb 7 (that was the first day of business at my site) were accepted on Feb 6!

I checked the reports for this week, and sure enough for a number of returns created on Sat Feb 14, the acknowledgements said they were received on Feb 13.

I don't know if it happened in the past, but it is only this year I noticed this phenomena. Maybe my eyes are playing tricks on me, maybe it is a phenomena that occurred only at my site, or maybe I was just lucky in getting strange experiences? This happens not only from my reports, but from reports generated directly from the reports list in TaxWise, and even in the IRS Ack reports coming back from the EFC.

Anybody else have this happen at their site?