Matching rules: Troubleshooting / matching correctly

Hey there,
I have some trouble lately matching files and I guess I just don't understand part of the matching logic.
Example: I match
<date - automatically detact date format><anything>
and want it to trigger with files like
20210312-something
but not
xx-20210312-something
As it turns out it does trigger not the first but does the latter - which lead to around 450 already named files getting a bunch of renamed long date name files. Thank god there was dropbox rewind.
I don't get it why it is not working as expected. Can someone clear things up?
Thanks,
David
I have some trouble lately matching files and I guess I just don't understand part of the matching logic.
Example: I match
<date - automatically detact date format><anything>
and want it to trigger with files like
20210312-something
but not
xx-20210312-something
As it turns out it does trigger not the first but does the latter - which lead to around 450 already named files getting a bunch of renamed long date name files. Thank god there was dropbox rewind.
I don't get it why it is not working as expected. Can someone clear things up?
Thanks,
David