Facebook issues , Weird Notification problem .?

[kika_the_kid]

Alright, well to put this briefly, lets say you post a comment on a friends wall, when they write back you get a notification . My issue is Facebook will give me the first notification but if i write back a 3rd time and they respond , it will not notify me. Same gos for pictures , comments , and etc. I will get the first and maybe second notification of a person writing back. But what i wont get is a continuation of notifications when normally everyone elses facebook does so. What is the problem ? Or what should i do because i honestly tried a few things but nothing changes.