The child porn was in the paragraph above and then the officer continued on to explain what else has been found is the way I read it. Two different paragraphs outlining everything that was found.
Why I think they talk about the one child porn image is that they are connecting the dots and know that it ties to SA. What we do not know is that out of over 100,000 images on his mom's computer, how many are in fact child porn?
It does seem all confusing but we really don't have a clue as to what LE really has as evidence.
We have to remember too that this affidavit is to give probable cause for them to search GMA's house which is why they mention that one cp image that ties two computers in two separate residences.