Thanks for the response .
I guess the issue is, you are answer values to these two columns in your email body / email subject. My suggestion is to delete both apply to each action blocks, then add a 'Send an email' action block and try not to add any value related with these two questions. Retest and verify you will receive just one email.
Already did this and this is not my requirement. This will be a standard approach
If you need to send with your email values selected in this two questions, I would suggest you a different approach, like adding two 'Create HTML table' action blocks, and select as its inputs each multioption column name, and finally refeernce both 'Create HTML table' outputs in your email body
Do you have screenshot for this ? i dont see HTML table when SharePoint Item Creation triggered