Separate domains for Forms and Reports 12c

HI,

I am following the notes on https://docs.oracle.com/middleware/12211/formsandreports/install-fnr/install.htm#FRINS101 to install F&R 12.2.1.1.0 on Windows 2012.

When I installed WLS - I did not create a domain.

When I installed Forms, I created a new domain and repository

Then, for Reports created another new domain and repository.

Should these have separate admin websites?

I left Forms at    my.server:7001     but created the Reports adminserver at  my.server:7011.   It did not seem correct for them to have the same port.  Is that the way to do this?  It seems cumbersome to have two websites.