I tried assigning start to something that isn't enter, either way and even in co-op, no button assigned to start responds. Ahhhh they should have given Loretta her own select spot. I'm sure I have the latest version.
http://serio.piiym.net/cvbla/All the other buttons/functions respond for different colors. It is strange they give select spots to characters related to Castlevania, but not Loretta. She has her own identity and unique moveset, she's not Stella's shadow.