For WES, put the dates same as per your degree award letter so it matches with the supporting document.Can you please tell me how did you enter your credentials in the WES application?
The BSc OBU degree is awarded to me in 2014. What will be the start and end year for this ?
Similarly for ACCA I enter it as diploma and would enter start year as registration year and end date is awarded year 2013 for me
For ACCA, my first attempt was Jun-11 and membership awarded in Feb-17 so i put Jan-11 as start date and the date of membership certificate as end date. You can put end date same as per your certificate.