I will explain how I see the chair's ruling in the context of the start of the meeting.
He called the meeting to order, explained the rules of procedure for virtual attendance, and then we got to committee business. Before we resumed debate on the motion that the committee discussed last time, Ms. Thomas asked to speak, the chair recognized her, and then she moved her motion.
Until the committee resumes debate on the motion from the last meeting, we can use the floor for another discussion. That is my understanding of the chair's ruling, given the timeline of events. As the chair explained, the debate on the motion was adjourned at the last meeting. So the committee was not required to resume debate on this motion. It could debate something else.
That is how I interpret the current situation.