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Dual Code recommends using the self-enrolment method is called "Self enrolment (Advanced)". The regular "Self enrolment" method continues to be supported but will not be enhanced with new functionality. It also does not support ecommerce.
It is possible to enable multiple enrolment methods on any given course. When doing so, the methods should generally be restricted by cohort.
If multiple self-enrolment methods are enabled on a course and the user qualifies for more than one method of enrolment, only the first method (the top method in the list of all the enabled methods for a given course) applicable to the learner in question will be presented to them. It's therefore important that you put the methods in the right order.
For example, if you have two “Self enrolment (Advanced)” methods in the course, with one of them being restricted to Managers and the other being available to everyone, you should put the method available to everyone below the method restricted to Managers. If the method available to everyone is at the top of the list, Managers will be presented with that method.
In earlier versions of the learning environment, if multiple unrestricted self-enrolment methods were present in a course, a user would be presented with numerous options (e.g. numerous "enrol me" buttons) when trying to self-enrol. This is usually a configuration error on the part of the instructor who did not properly set the restrictions on an enrolment method. In the event that an administrator truly wants to disable this enhancement and continue to display numerous enrolment options to the learner, they can disable the "Show first enrolment option only" setting in the system-level settings“Learning management” tab under Site Administration > System Configuration.