Menu display issue

Hello, when I publish my module,
on the menu the progress of the slides does not appear in the order I created it.
I have names of slides that are at the end of the module that appear when starting the moduel? can you help me?

you can see on the attached capture that the slides "loi " "la loi" "obligations legles" appear at the top of the menu while they intervene later in the progress of the module...I do not understand why...