This was just updated on the OINP Program Updates:
February 27, 2017
IMPORTANT NOTICE
Re: Deadline for Submitting Online Applications through the OINP e-Filing Portal
In order to be responsive to unprecedented application-volume demand on the system, the Ontario Immigrant Nominee Program (OINP) has revised the deadline from seven to 14 calendar days to submit applications through the e-Filing Portal for the following streams:
International Masters Graduate Stream
International PhD Graduate Stream
Ontario’s Express Entry Human Capital Priorities Stream
Once you successfully register a profile under any of the above streams through the OINP e Filing Portal, you now have 14 calendar days to complete your application. We are making every effort to ensure we have the technical capacity to meet volume demands and we will continue to monitor the system 24 hours a day, to address any issues.
It still won't really help if they don't fix their website.