If you are counting all degrees toward the points you need ECAs for all.
The confusion comes from the fact that the CIC EE application does not explicitly state on it’s application web page that you need to add ONLY the highest degree in this section, and then add remaining (lower) degrees in some section at the end of the application. The first “Education” page I saw asked for my degrees so being the honest guy I added all 3 without realizing that this would mean ECAs for all.
The actual problem is that our bachelors (if Indian) universities are bureaucratic nightmares, don’t have an efficient online system to order transcripts like US universities do, and are slow as snails in getting us the transcripts so it’s just better to avoid adding Indian bachelors ECAs. My bachelors university still uses the paleolithic “Challan” system and took 2+ months to send the transcripts.