Business Hour Adjustment not changing calls direct to voicemail

The initial configuration of our business hours was 9 to 5. Outside that time frame, calls go direct to voicemail (as they should). However, when we adjusted our business hours (to 8:30 am from 9) calls between 8:30 and 9:00 am are still going direct to voice mail. The hours under Company Info are correct (revised hours) but no change. We checked everywhere we could for DND issues, but cannot find any that would be forcing the call direct to voice mail.