Payroll accrual percentage not available?

So what super simple thing am I missing.   Note in the image below.  This should be allowing a 100% accrual but the percentage is greyed out and changing the accrual and posting dates does nothing.   However, if I change the pay period to cross the month end it does work.   I'm expecting to get a posting on 3/23 to accrued wages and then the actual cash flowing in a second entry on 4/1?

And to make it even more confusing,  it works just fine on my own system.  All departments are set to accrue.