DRV2511-Q1: Odd TINA simulation results for AC analysis

I'm trying to build a motor driver using the DRV2511.  It needs to be DC coupled and I'd prefer to work out the details in TINA before creating a protoboard.  Using the TI reference design "slom423.tsc" I get the following results which don't agree with each other.  For transient response the system shows a voltage gain of 10, or 20db, exactly as expected for the default FS0-2 gain settings.  Input is 1V and output is 10V.

However, looking at the ac response gives a magnitude of -172db at 1kHz (equal to voltage gain of 2.5e-9) which makes no sense to me.  I would expect a magnitude of 20db.

Any idea what causes this error and how to correct it?  This is needed to develop the proper control loop.