Restarting TurboTax Changes Tax Owed to a Refund

I'm wondering if anyone else has seen this. I've seen it twice now.

 

In my first run at completing my tax return, after restarting the program and installing the updates, my amount owed changed to a refund. The swing was quite substantial, more than several hundreds of dollars. 

 

I didn't think I should trust that result, so yesterday (March 6), I started over from scratch.  End result... I owed about a hundred dollars. Restart the program today, install the update.. same thing happens again. No explanation. Instead of owing, it now says I get a pretty large refund.

 

Huh?