Issue with multiple author output

I looked through the forum and did not see a post specific to the issue I am having. There were a few similar, but none addressed my problem.  I apologize if this was already posted and I missed it.

I am having a problem in EndNote X4 for Mac with the output for multiple authors.  When I put in the authors (either on a single line or on separate lines) the output will combine the two authors’ names.  I have gone into the style manager and tried to fix the delimiters, but that does not seem to solve the problem. The only way I can get the authors names to come out correctly is to place an additional comma in between the first author’s first name and the second author.  The problem is that this additional comma then gets in inserted into the output.

Here is what I am inputing in the author field:

Roberts, Bruce and Ray Jones (or Roberts, Bruce, and Ray Jones)

Here is the output (Chicago 15th A - Footnote):

Bruce and Ray Jones Roberts (or Bruce Roberts, and Ray Jones)

Any help on understanding this would be greatly appreciated.  I have not tried the other multiple author books, but I have a few that will be cited.

I have tried entering the authors on separate lines and still get the same output.  When I had them on a single line, I did put “and” in between.  I have not edited the output style for this particular issue. I am using the default settings.  

I am having lots of difficulty with the EndNote X4 for MAC style editing.  It is not saving my style changes and I am contacting tech support per the suggestion in another question I asked.

James