AWS repositories sharing snapshot data

I have an AWS cluster (v1.5) from which i have created a number of snapshots into a repository. Then during testing I tried to create another snapshot with the same name in another repository (in the same AWS bucket). The repository was successfully registered but then the snapshot creation failed with the error the snapshot already exists. I then looked at the repository in kopf and the same snapshots were displayed in both the new repository and in the old one, despite there had been no successful snapshots taken for the new repository. Can this behavior be explained as I would have expected the repositories to be separate stores?