I've been asking question about why my CPE doesn't show up automatically, but all they answered was just telling me to input it manually. They don't even bother to investigate or give proper explanation.
Presuming you are asking about Bright Talk "submitted on behalf" CPEs not showing up within a week or two.
"Why" has a pretty easy answer. When you first created your bright talk account and attended your first (ISC)² sponsored event, you were prompted to enter your Member ID#.
If you declined or entered a fake number, your CPEs will not be credited to your account.
"How to fix" is less obvious. The member id# seems to be stashed invisibly on Bright Talk's side. The only way I have found to fix it is to delete one's Bright Talk account and create a new one to force the prompt to reappear.
If you go down this route, first download all your CPE certificates as PDFs and keep a local copy so you have evidence if needed. You should be doing this anyways because Bright Talk only keeps evidence for your most recently watched events, which can be a shorter time-period than the "look back" period for auditors.