RoboHelp 2019 Parent Project Merge Functionality not Generating

We have a couple of existing projects and will have several other projects created in the upcoming months and want to combine the various projects into a single output. Our intent was to use the merged help function in RoboHelp. When attempting to do this, I click on new merge project, select my child projects to merge, click save and generate. The website that the parent project is generated on, the individual child projects aren't showing up on the website page. However, when I generate a child project to my parent project, all of the contents that are in the child project are being shown in the parent project not the individual books.