I noted that i can't buy anything on transfer's market. Everything appears with "..." time remaining. That's because the my computer's clock has the wrong time, when I fix it, it goes normally.
So, for testing, I've advanced the time in 2 hours, and surprise! It shows me the employees to sell in the next two hours.
My guess: do not base the site on the time of the computer, base it on the time of the server.
OR check if the time of the computer is correct and show a message.