Bought very old batch but price went up

[CoftheTMP]

I minted a batch and it listed at 210USDC
I bought an old batch today at 176 per item something like that. So way over 4 days.
Then minted a second batch
and it listed at 220USDC
It should have minted at 200USDC as the last batch to sell took over 4 days. Meaning the price is too high and so it needs to drop:

And then not making any further purchases another batch was minted and it came out at 230USDC so up another 10 as if a batch had sold out sooner that 2 days:

Another batch minted and it goes up another 10 to 240USDC, which is fine, as long as the last batch sold was sold in less than 2 day.

Now I'm going to buy out the oldest batch I still have listed 176USDC must have been there for 2 weeks. And then mint a new batch. I would expect the new batch to mint at 230USDC, 10 less than the previous one.
But: its gone up to 250USDC

So the re-pricing code isn't quite doing what we would like it to.