Let's say you are offered a GS at 10:00am with a voicemail and the wait "10 minutes" before they move on. Then someone else junior to you is given a different greenslip that you were never offered (which would have been preferred) at 10:05am. IOW, they skipped you because you were on the clock.
Any deal there or if they offer you one at 10:00 via voicemail, you are toast until 10:10 for the next one?