form_errors(form)
It contains just part of form errors. Some fields render their form errors along with them. There are about 14 errors and form_errors contains only 7 of them.
Id don't get how to solve it.
With so little information to go on, I can only guess that it might be a problem with error bubbling for the individual fields.
Make sure that you set the error_bubbling parameter to true so that the error gets attached to the form:
'error_bubbling'=>true
Otherwise, you probably have errors attached for the fields in question, to the individual fields, and not to the form, again assuming that is the behavior you want.