VF Stat table: two entries for "Regular"?

Why are there two entries for regular in the `STAT` table (here taken from the Italic VF)?

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is it because `LinkedValue` isn't available in format 2?

Reading the spec, using ranges for the weights IMHO doesn't fit well. If the user sets the VF weight to 799 and the UI still tells him it's bold, it might clash when the document then uses the static bold font for whatever reason and it's less bold than what the designer saw.