I'd like that the survey appeared only one time per user, when finish the survey, It doesn't appear anymore, is there a way?
Topic on Extension talk:Survey
This is the default behavior. If you're having the Survey show using the tag, the user will have a cookie set once they filled it in preventing it from showing again.
I let the defaultExpiry with the default value, but the pop-up survey still appears more than one time per user...I tried to overwrite the defaultExpiry value but it didn't work too. Do I have to change other configuration?
As I states, this ought to be the default behavior. If that's the the case, there likely is a bug somewhere, which you won't be able to fix changing the configuration. You can report the bug on bugzilla
But the cookie is not set on submitting the survey. It is already set when the survey is loaded. So you can easily circumvent filling out the survey by just clicking (x) or by refreshing the page and the survey neaver appears again, unless you purge your cookies. This behaviour doesn't make a lot of sense to me. Setting the cookie after submission would be a lot more useful.