SourceTree uses fixed size tabs for the repository names.
Long repository names, e.g. "ISC-2 App (Cube1)" showing only "ISC-2 App (...", are abbreviated in the tabs. If there is a second repository, that has a name that only differs after the dots, it is not possible to distinguish between the two repositories.
I would expect that at least a tooltip be displayed with the full name or maybe the current repository name in the title bar.