I am confused. Why are there several Jerusalem love chains running?

How are we supposed to differentiate them from each other when everything is called the same?

I count two other ANN's besides this one

https://bitcointalk.org/index.php?topic=5068218.0 and https://bitcointalk.org/index.php?topic=5042585.0

I mined some on the former, and am trying to get POS rewards now.