Hey, thanks for the Heads Up. I recall some behavior like this, in the past, on some other server. In that case the result was something like /htdocs.01/home and /htdocs.02/home and in the case of php/css you need to set the database for each first as well, and dont accidently pick the wrong one on install.
New here, so I will try a couple configs to see what is working well together, before committing to full site dev. Do remember you can always do a full backup before making changes(recommended). Also if it is too buggy, one can bypass Softaculous.