I think I can answer both questions with one answer.
You are correct. The Portfolio EA is a single file with multiple strategies inside of it. The reason I said to remove all of the acceptance criteria is you asked initially how to add or remove strategies. In order to do that, you’d remove the acceptance criteria and then run the Validator to ensure all of the strategies are collected into the Collection, and you can then edit all, or any of them.
Of course, if you want to remove the losing strategies, set the acceptance criteria, and also, in Data Horizon, select the dates you want to check the strategies’ performance within, or to make it easier to remove those that don’t meet your criteria in current market conditions.
I hope this answers your questions – if you have any follow up questions, please feel free to ask me.