I thought my instructions were clear. I am teaching an inquiry-based learning class synchronously but remotely. Because of the JMM2021, based on student availability I changed the time of the class last week to 5-7 pm Pacific Standard Time.
When someone cannot attend, I have a (less ideal) alternate to participation in class. Here are the instructions in the course discussion board which were discussed on the first day of class:

I can confirm that the promised message was emailed on Thursday evening. I received two “submissions”—one a link to a zoom recording and the other a pdf file and png picture but no recording. Neither was uploaded to the discussion board as requested but sent through the course management system mail client.
Where did I go wrong? How do I make my intentions more clear?