You only need police certs if you were living outside Canada. Vacation doesn't count.
Make sure your photos are stamped on the back with name & address of photographer or studio, date taken, and write your own name clearly.
Make sure your application form and your physical presence form are both signed and dated the SAME date, that matches the date of your presence period (e.g. if your 5-year period is June 12, 2014 to June 12, 2019, make sure you sign the date June 12, 2019).
Looks like you have everything in order. Your buffer time should be fine unless you are unsure of your travel dates.
Good luck!