Hi tom9699,
Thank you for using the Apple Support Communities. I understand you have a question about scanned documents, and I'm glad to provide an answer.
It sounds like you're using the steps from the resource Use Notes on your iPhone, iPad, and iPod touch to scan a document into Notes, and you're then using Share > Create PDF; is that correct? I've tested this by scanning a few different documents into the Notes app and exporting with the same result, so this looks like normal behavior when scanning a document into Notes and then exporting the note. You can always send feedback to Apple here if you'd like: Product Feedback
You may also consider checking out third-party scan apps: Download apps and games using the App Store
I hope I've answered your question. Take care.