I have problems with my memory as well.
My tonic-clonics are under control, but my s-p and c-p seizures are not.
Following a complex-partial, when I'm post-ictal, I lose my memory from 5min.-2hrs. after the event. It varies with each seizure.
I attribute this to several things.
1. I am on high doses of mind-altering drugs (change the uptake of neurotransmitters)
2. I have frequent refractoy szs., and I do believe decades of this can alter/hurt brain function.
3. It's the nature of the beast: seizures alter my brain's activity
4. I have a scar on my brain; no doctor has been able to tell exactly how my brain is wired b/c it mutated during gestation.
5. I'm getting older and my 5 yr. old takes my attention off of remembering details.
But as a cyber hug to you, I know how frustrating it is. I was upset about this just the other day. My husband swears I ate a bunch of cookies from the mall food court while shopping...apparently $10 worth...according to my bank statement. lol. I have absolutely no memory of it. I had had a seizure about an hour earlier, and I realize now that a large block of time is missing for me. Sigh...you are definitely not alone.