If I had unlimited R-gatcha I would do said tracking. But since I am FTP I just go by my limited sample. And yes I have gotten multiple N-R-SR cards from the squirrel for 1 R-gatcha at a time. Just the SR dropped fewer times then the other 2 for me. but as I said starting with the last switch in cards I still haven't gotten the SR. My thought is that with 1 R-gatcha the drop rate is about 3% on a card versus a consumable. And as we all know RNG is just that, random as fuck and aggrevating as hell when we do not get what we want!
Just because the drop chance is 1% that still doesn't mean that it's guaranteed to drop in 100 tries...