Hi Mountain Momma --
It is so frustrating that right when you most want and need information (i.e., when your kid appears at risk), you have to wait and worry instead. I would do just the same as you -- get on the computer and try and learn everything and anything about what might be going on. I am not a doctor, but I'll try and point you in the right direction. And we are here at CWE anytime you need to vent or chat or ask questions.
Your daughter's abnormal EEG is not necessarily connected to the specific seizure she had. The abnormal brainwaves may have been there prior to her seizure. For instance, in my case, if I weren't on meds, an EEG would show abnormal brainwaves (called spike-and-dome) all the time, regardless if I were having an actual seizure. During the seizure itself the spikes would get "spikier" and more extreme.
It's hard to know if your daughter will have another seizure... until she has another seizure. (I know -- Aargh!) Obviously it's good to avoid having repeated seizures, and your doctor may have advice about ways to do so, or whether the risks make it worth it to prescribe medication. Some people on this site have found that specific diets have been very helpful in preventing or reducing seizures, especially in children. You might want to search on this site for posts by Robin for more info about this.
As I understand it, the central-parietal vertex is the top middle of where the parietal lobes come together. (Basically the top of the head, not as far front as the frontal lobes). It may well be that your daughter has BRE -- I don't know enough about all the variants, and a lot of epilepsy is unpredictable.
I hope your daughter remains seizure-free, and that your neurologist is responsive and reassuring. If you have questions about what the doctor says, be persistent in getting answers from him. Don't be afraid to get a second opinion.
Check back here to let us know how it goes. We're rooting for you and your daughter.