I use the Custom option for my Family Journal reports but I do see one option that you say you are using that may be the problem. That is "Participants". The manual states that Participants -- Includes a list of participants and roles for each event. I have not used this option but it sounds like it would add a lot of repeated data.
Also you have checked Individual Reference which the manual states Individual Reference -- Includes the informantion entered in the Reference field for each individual. This could be where you have a specal number or letters for some persons. Do you want this to print?
I like the "Custom" style because I can add birth and death dates to continued children and generation numbers. Other options are less important but I use All Children and Generation back reference. Endnotes and Eliminate white space.