You did just fine explaining it. What you are noticing is how enmeshed (I am sure using that word a lot lately) Casey and Cindy are. There are NO boundaries between the two, much as Casey attempts to eke out. It suits her in some fashion to stay in the family home and put up with Cindy (primarily financial and babysitting) harping on her about how horrible her life's mistakes are and how bad she is as a mother, etc. It keeps them locked in the drama that started early on in Casey's life. Enter Caylee, who is doted on and spoiled and used as a pawn between these two women constantly. "You do what I say or I'll start proceedings to take your child away and then you can go out and sleep around and party all you want, but you won't live here and you'll be cut off from any money, too!" or "You know what, Mom? Fine! I'll just pack my things. I've got a guy who says he wants me and Caylee to come live with him but I haven't done it because I know you love her more than you love me, but now you've gone too far and we're outta here. I don't need this crap anymore. We're leaving and you won't see Caylee ever again!" (edited because y'all know they would have added quite a few curse words in this all.)
The simple fact is Cindy believes she is owed the information. If she's kept out of the loop, she gets stressed and thinks people are out to get her. If she can get her hands on the information, she'll better know how to counter it or corroborate. She is protecting the family unit, NOT Casey. Casey will benefit from whatever Cindy can do (as she always has, and as Cindy always has) to get her out of this mess, but there is an INCREDIBLE price to be paid later if Cindy is actually successful.
Of course, Cindy is not paying attention to the rules that state that LE owes her exactly jack. They attempted to do it as a courtesy, but she wants more than is reasonable. And she's been working angles right and left to try to get what she wants. That lawyer who took the senior Anthony's on as a client earns his fee every second of every minute of every hour of every day he has to deal with Cindy.
She wants to know what Casey knows because she wants to control everyone. The game isn't to build a strategy. The game is to sabotage the enemy.