Huh, you're right! As I look back over the core book and comp/con, it seems every reaction individually specifies how often they can be performed per round. Meaning that not only is "no repeats/round" not accurate, but also the more accurate "default no repeats/round" isn't necessary.
I'll add it to my list of stuff to change! Probably I'll include that as a minor update to version 2 at the same time that I publish version 3. Thanks for bringing it to my attention.