Reference overloading...

I have 2 basic content types: "User" and "Server".

Each server page can be referenced by many users and in turn, create a corresponding relationship with the users from the server pages. What I'm trying to do is make the server pages display every user that is referencing the server. Problem is that I'm getting the following errors:

Reference overloading: would of had 2 references and only 1 reference is permitted. Before adding a reference, you would need to edit to remove an existing reference and resave this node to have make it correspond. Or you could allow this reference instance to have more references, go to the field settings for this instance.

1.) There's no indication about what specific field is causing the issue here. Don't get me wrong, I believe I already understand what it's implying but it would increase usability if the culprit field were also included in the error message.

2.) The field I'm suspecting it's referring to is already set to have multiple values, so this shouldn't be included in the error message as a means of fixing the error and in turn, this would create a more CONCISE error message.

3.) With the corresponding node reference, you could have multiple fields reference 1 node and that node show all of those which referenced it. Why can this not be the case with this module? I'm assuming it uses the equivalent functionality, yes?

Any insight into this is deeply appreciated.