When an FMU is imported, a mo-file is generated as a part of the process. This mo-file contains other variables except from the model variables such as communicationStepSize, tolerance and more. The variables that were added by the import step have an annotation such as annotation(Dialog(tab="FMI", group="Parameters")) - however I believe it would make sense to make it more clear by either updating the annotation and/or naming the parameters such that it is clear that these parameters were not part of the original FMU that was imported.