There are actually two separate but I guess related issues here ... Firstly

Since DNN was developed there has always been a concept of Modules that can contain Multiple module definitions.   The User and Roles module has always been one of these.   When you drop the module onto a page it automatically adds multiple module elements to the page.

BUT, in dnn7 the new drag and drop control panel actually does not seem to understand the concept at all.  It only seems to see the FIRST module definition and thats all it is willing to drop onto the page.

The only workaround to this that I've found so far - is to login as Host and go into Host Settings -> Other Settings - and change the Control Panel setting from Control Bar to Ribbon Bar - this will revert you back to the OLDER style ribbon control bar - which WILL add all three module definitions to the page.

HOWEVER -- while this DOES work - what you do need to understand is that the Registration module that will be ADDED to the page is NOT the same module that you are seeing by default when there is NO custom registration page.   The module you will have added is the OLD legacy registration module that does NOT include all the new features found in the default rego page.  Things like custom field control and such.

For no fully explained reason - this actually started happening back in 6.x  and  to date there has been no actual module made available that can be added to a page which offers these new modern features ... 

Westa