Miyako really has no leg to stand on when it comes to finding Matsumoto creepy. At least she's not bribing a child with candy so she can take photos of her. Also, this was a cute chapter.
Matsumoto practically makes a ritual every time she makes clothes for Miyako, and it's not about their creepiness anyway, the whole point of Matsumoto's character is that she is there so Miyako learns to not be creepy anymore with Hana and just romance her normally, the big difference between the 2 is that Miyako isn't anymore the woman that bribed a child with candy to take photos like she did in the first chapter while Matsumoto is exactly the same as when she was introduced and she won't change, while Miyako changed a lot in these 50 chapters.
This permanent difference between the 2 is what makes Miyako only being able to progress romantically with Hana while only stay as friends with Matsumoto.