It took Greg a little time to work through Weasley's words and finally establish that 'he' in this case was 'George'. Ron's second statement was a little easier - though definitely not one Greg relished hearing.
"Why?" Greg asked, because he didn't understand what had happened to make Ron go from being an Auror to working in a shop. If Greg had a job like that, where he got to fight for a living, he wouldn't give it up to go work with stupid customers and stupider products. On the other hand, it was was Weasley and Greg quickly gave up on that line of questioning. "I don't care," he declared. "Do I still have a job?" It seemed only logical that if George had taken on new staff he probably didn't need Greg any more. As much as Greg hated the job, he didn't want to have to look for another one. It had been hard enough the first time, plus his mum would be annoyed.