Those streaks that you found are perfectly normal and are just high spots that need a second pass as you said.
You will have a hard time using too much product with Opti-Seal or Hyper Seal, but there is not really any benefit to adding countless layers of product. There is diminishing returns when using sealants, waxes and coatings. I find that applying one good layer, letting it cure for the required time, then adding a quick second layer is all that is required. Any more and you are probably just wasting product, money and time.
Using Hyper Seal as your drying aid with each wash is more then enough to keep it topped up for many months before needing a full decontamination wash and reapplication of it.