submit called twice in Blueprint wizard

In a custom blueprint plugin, if the user uses the tab key to choose the "Next" button on a blueprint wizard page and then the enter key to submit, the submit function registered on the wizard will be called twice.

For example, in the following function:

wizard.on('submit.registerPage1', function (e, state)

);

the "TEST" alert will be shown twice.

This also results in functions being called twice on the next page of the blueprint: for example 'post-render.registerPage2' will be called twice. This also has the odd behaviour of duplicating the following page - if the "back" button is pushed, the blueprint wizard will move backwards to the first of the two duplicated pages.

This can obviously be avoided, but is confusing behaviour from a user's standpoint.