Yes, every time the sequencer player that you bound the event to stops the event will get called. How many times are you playing the sequence that needs to play another sequence after it? Maybe you’re better off using master sequences.
Is adding one node too much? Also there are alternative methods of doing different things depending on how many times it was played, like adding a branch with HasPlayed?, if false it plays the second sequence and sets HasPlayed? to True at the end. The next time the flow goes through the branch it goes through True this time which may be empty or whatever.