Ah if thats the case with Bounding Toss I'd say don't reference flurry at all. Just have the follow on feat reduce the action cost of Bounding Toss to 1.
Actually, my original write-up did just have a "Swift Bounding Toss" that worked exactly that way. Ironically, I threw it out and replaced it with Throwing Prodigy because four attacks in a round (bounding toss -> rebound catch -> flurry) seemed like too much. XD
Also I think giving monks two different "2 attacks for 1 action" abilities that are similar but different fails the complexity test. Especially since a monk can already flurry with (some) thrown weapons if they have Monstastic Weaponry; it just made more sense to roll it all together rather than force the player to track two different abilities and how they function slightly differently.