The proxy updates only happen when the proxies need to be updated. If none come up as bad, why do we need to update them?
We ran into an issue with our checking system, which is why they came up as bad. That has since been fixed.
1 - Some stay longer if they are still good. Remember, these are OUR proxies, no public ones. Ones you get, may be ones you use for months. Exclusivity is key!
2 - Use ProxyShell - works very well.