I should have explained the whole situation, my apologies. I was using lang8 and corrected someone who wrote a message in french since my native langage is french. The replies which the person gave me after I corrected her text is by order : Number 2, 1 and 2.1. Around that time I also wrote an entry which she corrected and replied 3 and 4. Sorry for the confusion and I am very grateful for your help. Thank you very much!

P.S. If you have questions about my explanation feel free to ask me since I have from time to time trouble in english! :P