resolveSlotNo returns incorrect POSIX TIme

[safi-ullah08]

Here is an example of how I am using it

const addMinutes = (minutes) => {
  return new Date(Date.now() + minutes * 60000).getTime();
};

const slot = resolveSlotNo('preprod', addMinutes(10));

slot = 27345986

When I use this deadline in my validator I get the following error

{"invalidBefore":27345986,"invalidHereafter":null},"currentSlot":25198745}

This seems to be way off, I believe its not the addMinutes functions because I have tried it and it returns a valid timestamp