A question on fee estimators

So I was checking out this bitcoin fee estimator and I seem to understand that there were transactions in the last 24 hours that passed at a very low fee rate. We're talking under 5 sats/byte. Now, my wallet has been showing me fees of 200+ sats/byte for even a slow transaction (fees have been high for a couple of days). I'm having a hard time squaring those 2 things.

How could there possibly have been this many transactions with such a low fee? Am I misreading the data? The estimator seems to say that if I put a transaction fee of 10 sats/byte there's a 90% chance that I'm getting in a block in less than 10 hours. Is the website bad? Side question: what estimator do you use?