In NEP-5 standard, the code used is:
uint now = Blockchain.GetHeader(Blockchain.GetHeight()).Timestamp;
This should have been communicated before the ICO not after it. I mean Red Pulse team did a lot things right, but this second hour f.ckup is pretty serious. Aforementioned formula for determining the start of the second hour should have been part of participation's instructions and should have been repeated ad nauseum on Slack and other channels.