Sigh, again, different iM@S worlds don't mix; The events and backstories don't add up.
In DS Chihaya is already an international superstar and we have other overly exaggerated stuff. Takane and Hibiki were always part of 765Pro.
DS relation to SP story, boxM@S and 2 broken.
In SP story mode we have Miki calling P "honey" from the start, already being very very clingy. Miki doesn't start out calling P that in either boxM@S or iM@S2 nor is she that close to P.
SP story mode relation to boxM@S and SP broken.
In iM@S2 765pro is in a dip because the idols were producing themselves, thus reaching a wall in their growth and popularity. There's where P comes in. In boxM@S and SP story we have a P and he was there 6 months-1 year earlier than the one in iM@S2 appeared. In DS it's hinted that the 765Pro idols have a person very close to them, that watched over their growth and supported their work from the back.
2 relation to box, SP and DS broken
Let's not even start about the various mangas and cds.