Yes, BleedingAngel,
Dissociation is not uncommon at all for BPD. I frequently dissociated in youth which caused a lot memory repression. My current psychiatrist told me that my history of dissociation was overlooked, as I also have a seizure disorder.
A book that I read on dissociation talked about how those with epilepsy cannot be diagnosed with emotional dissociation. The difficulty with this, is the fact that people with epilepsy can have seizures and also dissociate in emotionally stressful times. My personal experiences is that seizures usually hit right as I'm coming down from the stress.
Anyway...dissociation with BPD is very common!