Why is the amount TurboTax populated for last year's state refund lower than the actual refund amount?

In the "Tell us about your refund" section, TT populated an amount for my 2016 state refund that was lower than the state refund I actually received.

The amount that I actually received (I double checked my bank statement) matched what TT had told me last year I'd receive from the state for my 2016 return. That's why I was especially surprised (and concerned!) that TT populated a lower amount when preparing the 2017 return.

Shouldn't TT populate what it knows to be the state refund amount from 2016, since I used TT to prepare my 2016 fed and state returns?

For now, I replaced the amount TT populated with the amount I actually received back from the state.

Is that the proper thing to do?

Thanks!