Yeah. I hope they fix this. Obviously seeing more furniture than intended isn't that bad, but we really don't want to run into future issues like Zanil not appearing or only appearing on certain platforms... as we had a few times before.
Initially, I thought this was an intended change - to merge two weekends' themes together to compact the luxury furniture rotation into a year, instead of drawing it our further and further as we had with the new theme additions. I think it would be a good idea to have him sell 2 weekends' worth of items at a time, as the wait time is already quite long with all the themes we have.
But of course, since it only happened in some instances, it seems it's a bug rather than a design decision.