I've been flushing and its now 2 years. I used to do the enema the day of the flush and salts have not been an issue with pooing on the same day. On my last flushes tho I did have bowel movements cause of the epson salts and tbh I think its great cause I do not see a reason to do enema when I already pooped it all.
I do not know what condition is affecting you. In my case I have seen improvement but I am not healed 100% but I can say is that now I can eat pizzas and fatty food no problem, whereas before I simply could not eat fatty food anymore cause my liver would give me pains! I feel so much better in that regard and it is right after the flush that I feel better the most cause right after the flushes I do can feel a relief like I do not have something stuck anymore.
About how long you should keep flushing, its said till no stones comes out. I am on the same boat as you as I have done similar number of flushes and I still pass stones. I have to say tho that each flush the amount, size and color of the stones were not the same. And only in one of my flushes I vomit the oil, all the rest have been no problem.