This thread is from a year ago, but your question about fine-tuning your EA to send notifications once is still relevant and valuable. Technical challenges like this can persist over time, and your quest for a solution is commendable.
While the thread may have aged, the principles of coding and EA development remain consistent. If you find that the code in the shared link doesn't provide the desired behavior, revisiting and debugging the logic within your EA can still lead to a solution.
And for staying informed about coding practices and tech-related topics, you can always explore multitechverse.com. It's a helpful resource for tech enthusiasts seeking to expand their knowledge.