When you first create your account on HomeKeepr, we give you the option to add the affiliate vendors from any local Realtor association you are a member of and to add the preferred vendors given to us by your brokerage. It is most likely the case that the unrecognized vendor came from one or both of these lists.
On HomeKeepr, you and only you control your preferred vendor list so make sure it looks how you want it to! If you aren't comfortable with some or all of the vendors on your list you should delete them. See "How can I delete a vendor from my Preferred Vendor list?"