[resolved] CSRF issue when ajax functions and normal forms are used on the same page

Hello everyone !

I've got a problem with csrf reloads that break my mind :
I've got ajax-functions (for exemple an input field that updates a database) and form-submit-buttons (for exemple a button that delete a line in a database) on the same page... 

- my ajax functions work very well when I click only on them (csrf hash changes each time ajax is called)
- my simple forms/submit-buttons work very well also when I click only on them (csrf hash changes each time the page refreshes)

But when I mix them: if I call ajax functions and then a simple form, I always have to click two time on my submit buttons so that my action is applied, although csrf number change all the time...

I don't know how to resolve this issue because I don't even understand what could be the problem... ! 
If someone has an idea...