The meat ignoring thing is just talk of you trying to convince yourself going back to meat. There is no "real" rationale for any of what you are saying. If you wanna eat meat just do it and not whine and blame things on not having it because bottom line is you really have no clue why any of what you are describing happened. Kidney stones don't form overnight. They most likely formed in the previous years of all your meat eating and with this I'm not saying the meat caused them either.
Not eating meat and going vegetarian means absolutely nothing one way or another if you don't educate yourself on quality nutrition and make a point of eating a balanced diet of mostly whole foods and eliminate precessed foods. There is no one trick pony. It is a much broader picture.
I am extremely experienced with kidney stones as I suffered from them chronically to the point of being hospitalized for a week from the way my body reacted. What I will tell you is that in the last 9 years that I have been doing the MC with at least one 40 dayer each year. I have not had one single incidence of kidney stones.