RatherRandom on "[Plugin: Job Manager] Sorting problem"

Hi

There seems to be a problem sorting the job posting. I sort it by start date and it doesn't seem to be sorted in that order. Please assist

http://calicoasia.ratherrandom.com.sg/jobs/

https://wordpress.org/plugins/job-manager/

I've tried to insert these 2 lines in php.ini and restart the process, but it's still not sorting according to start date / date posted.

max_input_vars=2000; post_max_size=20M.