I have had green card for three years. I made multiple overseas trips as required by my US job for doing business. Non of which was more than three months and accumulatedly the overall length of staying outside US was less than 50% (1.5 years) in the past three years. I did not have problem in coming back to US until recently one immigration officer at airport suggested me to apply for re-entry permit. He also said that he will make a remarks in my record. I read the instructions of I-131. It says that re-entry permit is basically for those who want to stay outside US for more than one year. I do not intend to do that and want to keep my future trips short but frequently, as required by my US job. Shall I apply for re-entry permit now?