First off, thank you for your patience throughout this transition. As you mentioned, we've been making tons of changes to the marketplace based off what members were telling us in hopes of bringing the community the best marketplace experience we can.
What you just described is actually a bug! Clicking on the "BMW" tile should only display the listings that are tagged "BMW", however, it looks like it's instead showing you all of the listings recently posted in the marketplace. We hope to have this issue resolved in the upcoming release (hopefully within a week or so).
In the meantime, you can get new listing updates in your email by making sure you're following the "BMW" tag. You can easily follow/unfollow tags to customize the alerts you receive from Panjo. You can also browse the "BMW" feed by "Last Updated" which will display recently updated listings (e.g. price drop, added photos) in addition to all newly listed items tagged "BMW".
Let me know if you have further questions or if there is anything else we can do to improve your marketplace experience. Thanks for being a great member of the community.