Or they can't find all the entry/exit data for you and are looking further. Or could be your application was selected for quality assurance check for physical presence.
There are a few scenarios and you'll drive yourself nuts trying to figure out why. This is why IRCC recommends that applicants apply with well over the 1095 days. If applicants have ample buffer days (e.g. 30+ days) then IRCC does not need to deeply scrutinize any possible date discrepancies because they know you'll meet the 1095 requirement. But if applicants traveled and then apply with exactly 1095 days or let's say a 5 day buffer, then IRCC would scrutinize date discrepancies to ensure the 1095 requirement is met.
