Physical Presence Calculator Error?

[unsvn.it]

I have used CIC Physical Presence Calculator to calculate when I'm eligible to apply for Citizenship.
It seems the calculator has error. Please see the results below

From: 2014-12-25 to 2015-01-17: # Days: 11 (should it be 22 days?)
From: 2015-08-30 to 2015-09-18: # Days: 9 (should it be 18 days?)
From: 2016-11-18 to 2016-11-30: # Days: 11
From: 2017-10-14 to 2017-10-29: # Days: 14

Assuming the last two calculations are correct, then I should have been out of Canada for 22 days and 18 days for the first and second trip.

Any insight about this is appreciated!

 

[Mrva21]

When did you become permanent resident? If you become permanent resident after 18/09/2015 then days prior to that date will be counted as half a day!

 

[unsvn.it]

When did you become permanent resident? If you become permanent resident after 18/09/2015 then days prior to that date will be counted as half a day!

Thank you so much for your reply. What you said makes sense to me. I became PR in 2016.