Email Clicks - INNACURATE - WHY??

Email Clicks - INNACURATE - WHY??

I'm finding that if I have 10 or 15 clicks on a link in an email sent, that they all generally have the same time and date stamp. If my campaign goes out at 4PM, and I get 10 contacts that click a link in the email, then the time and date stamp is 4PM. This is IMPOSSIBLE. And, many times, it's contacts from the same domain (joe@xyz, tom@xyz, etc). No way they are reading these emails and clicking at the same time. Any ideas?