Flea Help -What am I missing??

I posted here 6 days ago because my foster cat had fleas. I took everyones advice but I feel like its getting worse - please help!! I am so freaked.

I thought I caught it early - the cat had 3, she got capstar and preventative, several brush throughs only revealed 2 more. She is no longer in my apartment (she was a foster). She was not itchy until that day, I saw no evidence of fleas or flea dirt. I stripped the beds, vacuumed, washed all her stuff. I have bought the sprays, sprayed my couches and carpets, vacuumed several more times and have dumped the canister immediately and washed it after every vacuum. Most of my apartment is wood. I washed all the dirty laundry and anything the cat might have been near. I mopped, keep changing the sheets, etc.

I thought I was in the clear as 5 days go by still no sign of dead fleas, flea dirt, or bites on me. Then yesterday I saw 2 live ones and today have a couple bites. I sprayed again, stripped the sheets, vacuumed. I then saw 2 live ones in the vacuum canister! I thought the sprays were supposed to kill them? I doused all the furniture and carpets this morning.

Is it normal to have stragglers after sprays?? What am I missing / doing wrong?? Do I have to wash every single item of clothing, towels, shoes, etc in my closet? Do I need to take everything off the shelves and scrub every dish and knick knack? All the bedding and pillows i washed the first time on super hot I have stuck in a closet - when are they safe to come back out? Should I toss the broom and vacuum? I am so lucky that I don't have hundreds jumping around or flea dirt in my bed but why am I seeing more now after all the measures???