Justification not working as intended

[Erpès]

Hello, sorry if the answer was already ask but i couldn't find anything. The fact that i am not an english speaker doesn't help

Like you can see in the picture, the problem appears when i try to justified the text except the last line. Its doesn't work as intended and the last line will streach, (the software justified the whole text), in the second picture i use the justification on whole text and nothing changed.  Am i doing something wrong ?

Thanks for your help in advance

 

[Erpès]

Nvm i got my answer, which is an abusive use of linebreak instead of the regular return

[Old Bruce]

Thanks for replying and telling us how you solved it, this will help others with the same problem.