Damn you are infuriating. How are they "reused". What does that even mean?
It means that the 20 "spaces" allocated by these generic names were originally occupied by real programming and test channels. It's not new space obtained by leasing new transponders or activating unused transponders.
It's so sad that you allow yourself to get angry because every thread you read you find hidden communications about previous programming.
Get over yourself, watch your language, and learn how to read.