you've changed something, it's within 3 seconds now

right?

the time on the server was wrong. all I did was ntp sync

on the server with monero-pool, not with daemon?

pool and daemon are on same server.

I suppose with daemon too

ok

no errors in my code, great

the error is you are trusting the timestamp given to you

you certainly cannot trust the timestamp in the block either (if you are even using that)

If it was just not synced time then nothing interesting except easy fingerprint

But in case of something else It will be interesting

I've expected just unsynced time

0.6% Pool Fee