and how long have you had plus installed? cos it starts from the moment its installed.... it will say 2> because it wasnt there to see if you talked to them before that, so it just puts what it knows, and that is: that you havent spoken to that contact for more than 2days....
(someone correct me if im wrong :/)
for example, i installed plus 11 days ago, so those contacts who have not been online or talked to me since i installed it, show as >11 days (> meaning more than, and < meaning less than) the contacts ive talked to 30mins ago show as <1day, because plus deals in days, and 30mins is obviously less than a day
hope i helped