It would be remarkably odd for a hotel to move a checked-in guest without notice. You run into all sorts of liability issues in terms of the potential loss of the guest's personal property.

Did you tell the hotel that you're using the room as an office and therefore wouldn't be keeping luggage/belongings in the room? That would be the only way I see moving a guest without notice as being okay.

As someone who worked at and supervised hotel Front Desk staff, I concur with DELee. This incident was likely the result of human error.

I was fortunate to work in hotels that attracted lots of people who viewed working at the Front Desk as the first stepping stone of a hospitality career. As long as one of those types of employees was working every shift, the number of stupid mistakes dropped significantly because they could advise the rest of the crew.

But lots of hotels only attract hourly workers who view the job as a just a job. Although I've never read any research, common sense tells me that there will be more dumb errors in those types of hotels.