Tracking Events (Javascript) use previous 'customer_properties'

I use Tracking Events (Javascript) and now it uses previous 'customer_properties' and tracked events for previous profiles.

Before sometime it’s working fine and tracked events for the just identified profile but now it’s uses previous ‘customer_properties’.

My JS logic is as follows:

_learnq.push(['identify', {  '$email': email,  '$first_name': firstName,  '$last_name': lastName}]);_learnq.push(['track', 'event1', {  "FirstName" : firstName,  "LastName" : lastName,  "Comment" : comments}]);

_learnq.push(['identify', {  '$email': email1,  '$first_name': firstName1,  '$last_name': lastName1}]);_learnq.push(['track', 'event2', {  "FirstName" : firstName1,  "LastName" : lastName1,  "Comment" : comments1}]);