DO NOT DECLINE any ITA, your score is 466 and you didnt claim points for having a job offer which gives you additional 600 points so its no misrepresentation!
I would say since your job has an end date, you should just say NO to having a job offer and then you can include a LOE explaining that you did not understand the meaning of JOB OFFER when u filled out your express entry profile and however you didnt get any points for it, but however you have to meet the proof of funds requirement!
I faced same dilemna myself as well, but i didnt decline, i left my answer as YES to Job Offer and NO to LMIA, and i had to show offer of employment and letter of employment which included promotion letter, although mine stated fulltime regular.
SO i would say you are good to go with your application and keep praying. GOODLUCK