Alice, I moved this thread temporarily to this board hoping it will get more notice and advice.
Although I haven't tasted it myself, my understanding from others is that excessive rennet will taste bitter, where did you get yours and how much used?
Also, before you ladled the curds into cheesecloth and I assume then hanged to drain, how was the curd? Did you get a
good curd set like this?
I don't make Chevre, but when I make similar Neufchatel, I find I have to scrape walls of bag and mix in to get smooth consistency as curds against bag dry more than curds in middle. Is the sort of lumpy you have?