If I start my turn already [raging](https://www.d20pfsrd.com/classes/Core-Classes/Barbarian/#TOC-Rage-Ex-) from my previous turn, exit rage, and then re-enter rage and stay raging by the end of my turn, how many rounds of rage should I deduct from my 'rounds per day' counter? Only one, since it was contained in one round, or two, because it was two separate instances of rage?

Similarly, if I start my turn not raging, rage, exit rage, and re-enter rage all on my turn (provided that the GM allows it under the "reasonable amount of free actions" clause), would that expend one or two rounds of rage?

Should be noted that the post-rage fatigue is not an issue here, due to use of a Flawed Scarlet and Green Ioun Stone and the Internal Fortitude rage power.