I had IP1 back in march and NA all the way from Late march...Yours has most likely changed to IP1 and back to NA without you noticing when I look at your timeline, you are IP1. There is no email, nothing when CIC changes your background check status and also the days difference between NA - IP - NA is in some cases only 1 day (like in mine). So I really think you are IP1 at the moment
Just a reminder - Background check changes as follow - N/A - IP1 - N/A - IP2