I feel your pain. I will be a senior in high school this next year (in a school with mostly wealthy kids who have been handed everything from the start . . .). I have epilepsy and have missed a lot of class due to illness and hospitalizations. The disorder is bad enough, but the medications to control the seizures have their own complications to contend with. My high school grades have not been stellar as a result. I have done better when a teacher has a generous make-up policy and not as well in classes where the teacher is a stickler for attendance. I pulled an "A" in AP History, but I don't know how I would explain a "C" in "Social Dance" to an admissions officer. My parents have already told me that they want me to live at home and go to a community college for my first year or two so they can help to monitor and stabilize my health. I imagine that I will be in the position you are facing in my not-too-distant future.
Not that my situation has anything to do with your essay, I just wanted to let you know that you are not alone.
Do you have to submit your high school transcripts with your application or just the transcripts from the community college? Your community college grades are enough to stand on their own. If you do have to submit your high school transcripts, I could see where a little explanation is in order to tell about the various schools/programs and alternate route that you took. Your success in community college should assure an admissions officer that you are recovered and not a risk for failure. Personally, I see your recovery from the eating disorder as a badge of strength and a life experience that has made you stronger while providing insight into human nature including your own. I acknowledge that there is an element of risk in divulging the nature of your illness, but I don't think that a reasonable person would hold it against you, especially because you have recovered and shown success in a community college setting (and even in high school while battling a debilitating condition!).
If you do talk about your struggles with illness, emphasize the recovery as well and how the experience has helped you become a better person.
Eric Noto