Automatch matches same profiles mutiple times

Summary:

We have set up an automation that runs the automatch each hour. But now I see that in the job logs, the same profiles are matched each hour (see logs attached). I would expect that it only matches the unmatched transactions once.

I'd like to understand:

• How automatch works in the background.
• Is it enough to run this on the data import, or is it needed to run seperately.
• Does it get triggered uppon a data load/import in the data exchange?
  

Version (include the version you are using, if applicable):

25.04.65