From the looks of this, You're ranting.
And this isn't the section for that.


As for your actual question about the pre-selective characters.
The system doesn't allow same character names. Matsuri/Survival have a structure that considers the selection as lineups for ninjas, which means the same ruling applies when selecting them.
It can be silly and it's understandable, but it's how it's coded.

Anyway, I'll relay your thoughts to the team.