Time stamps for OLH on Hybrid or ERO

I'm a Chevy Dealer on UCS and the tech's sign on/off each line as they work on a vehicle; my question is in P&P 1.6.1b and 1.6.2 it states there must be "a system generated "on-time" and "off-time" for all straight time entries". Would that be a seperate entry or would the normal on/off time stamp with my electronic AUTH for the OLH or straight time be exceptable?
Also in reviewing RO's I've seen where tech's may have more flag time then time actually signed on the vehicle, would this be an audit red-flag?
Also in reviewing RO's I've seen where tech's may have more flag time then time actually signed on the vehicle, would this be an audit red-flag?