It can take couple months for your home to be rid of fleas due to new hatchings. Treat your yard, as, with weather turning cold, any new hatchlings will immediately latch on to your little ones and come in.
When vacuuming the house, be sure to move furniture and vac under couch/chair cushions. Also, open curtains/shades during the day and expose as much of your house to light as possible. Fleas like darkness. Take away as much of their refuge as you can and treat any remaining dark areas (like under furniture/beds) with your Biospot or a product like Flea Stoppers (
Phydeaux: Flea Stoppers Powder - 5 lb).
Any fleas exposed to Frontline will immediately no longer be able to eat or mate, and therefor not be able to reproduce. Most of the fleas you are seeing jump on you are dying. Keep that in mind and take heart.
Good luck. Fleas have been bad here in SC as well. Even with the nights entering the low 50's, I have seen welts pop up from new fleas on my Rat Terrier while on walks.