Yes, the groups are not mutually exclusive.
If added through automatic research, the keywords will be added under a group named “SEO Opportunities + [date of the research]”.
If they are uploaded manually or through a CSV that doesn’t mention the corresponding group(s) name(s), an automatic “Import + [date when the upload is made]” group will be created.
Should you be uploading keywords that are already tracked or repeating keywords multiple times in either of the upload options, SEOmonitor will ignore the duplicates and add every keyword according to the first instance in the file.
So keywords can be tracked in any number of Groups and/or Smart groups and/or Folders, without being duplicated (physically or in the overall count of metrics), in any type of campaign.