Frustration and new lesson

I just started using FireLine 4lb crystal beading thread. I made my favorite bracelet so far and when finished it just broke in half. Trying to not go into drama queen I looked to see what I had done wrong or how I could fix it. If you want to go straight to the punch line the beads are all back in their place in the box and the string is in the garbage. I have looked up information on the thread and have gotten mostly positive reactions from people. I will say I did buy it on eBay so maybe it was old and out of date. I wonder if that can happen since I have thread older than me doing fine. After thinking about it the way I was weaving the thread through so many times, I think I just broke the thread. So how do you avoid this from happening? Write me if you have any ideas. I will try again tomorrow and hope for a better outcome. On the good side I got a great deal on beads in boxes of all kinds. Many a bit primitive for me but still great potential. I feel bad for the person who sold it because they really didn't get anything close to what it is worth. I don't want to admit how much I enjoyed organizing them as much as I did. I have always loved color coding so it was an OCD heaven. Hope everyone is in the best of health and happiness. I am getting snow, snow and more snow.