this is probably caused by your broker execution issue ... if EA fails open trade at first time (broker denied it) than it try second time ... and broker decided open first trade and second too 😄 😄 not sure if this is your case, but it happened to me with bad brokers ...
you can avoid this problem with some control, where you check opened trades and if there are 2 (maybe in the same time +-10 seconds) than one trade will be closed ...
M