Confused about child's EEG results

Several months ago my 2 year old child was referred for a sleep deprived EEG, which was done at a local children's hospital. She has diagnoses of 1q21.1 micro deletion, microcephaly, intellectual disability, and a host of medical conditions not related to the brain. She had been having brief "zoning out" episodes for some time before the EEG was ordered by her neurologist. After the testing was interpreted, we met with the neurologist. He explained that my daughter had an abnormal result, which included spiking mostly during the time she was asleep. He said that this was seen in patients with intellectual disability, but that we should be alert that she could develop seizure activity at some point. He then told me the types of things to look for and be concerned about. We continue to see him every 3-4 months. My daughter's "zoned out" periods continue, however we are able to get her attention and he explained that these may also be related to intellectual disability and shouldn't concern us unless we are unable to get her attention. I have tried uselessly to find information on spikes relative to intellectual disability, or information on spikes not indicating seizure activity but suggesting that it could happen in the future. I'm even starting to wonder if we should get a second opinion. Does anyone here have any knowledge or experience to aid me with this?