I believe that too. I don't know what was offered to you, but your excerpt from the development plan certainly shows the same property that was discussed here.
yes, right, it is definitely the same one in Sindringen. We have very similar ideas: however, we want to place the house on a garage and basement and build an extension of about 80 m2 for the parents at the height of the ground floor.
Our situation differs from the OP in that we have planned a bit more budget, aim for "only" 240 m2 (160 & 80 m2), and I am allowed to buy both plots (so I can also play around a bit with the driveway).
Do you know architects in Hohenlohe/surroundings who are familiar with hillside properties? Would be grateful for recommendations