Exactally. Bringing on the check fraud charges are baffleing. Unless you believe (like I do) that KC WANTED to be caught and punished. Otherwise, she would have had an "out". A back up plan to dissappear. While she was a "good" liar, she's not the best. She failed to come up with believable lies for much of this case's circumstances....
I have often entertained the idea that KC knew she would be caught eventually (different from wanting to be caught). Afterall, she had to make sure CA knew she (KC) was punishing her and taking the one thing she truly loved away from her. Perhaps that is why she went on the spending spree with AH's money (signing her own name to at least one of the checks) and partying it up until she was caught. She had already abandoned her car with the decomposing body smell and couldn't expect that TonE would haul her around forever. She even posted taunting messages to CA about Caylee on MySpace.
When CA was calling LE, she was telling LA that perhaps it should have been done a long time ago (she stole, she was not a good mother), I think maybe she was ready to give it up. Then CA comes in and KC's back goes up against the wall and she can't tell CA the truth for fear of her own life (at that 10 minute time in her life). She then starts making up the story about the kidnapping and lets it roll with the punches.
To sum this up, I kind of think she knew she would get caught, but when it actually happened, she wasn't prepared for the finality of it (her freedom). Then once JB got ahold of her (surprise) she sticks with her story of kidnapping.
This is not a steadfast opinion, I have just often thought it could be a possibility.
Sue