Reds and oranges are notorious for bleed through. I've not used any of the modern sealers so I can't speak with authority but normally a "sealer" needs solid, unbroken coverage to actually seal. Any gaps in coverage allow the under coat to bleed through. The sealers I used in the day couldn't be sanded because you would break the seal by doing so. You need to address the issue before applying a topcoat or the bleed through will continue.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.