Linda,
I see that the system has sent you a total of 6 emails in the last 24 hours.
4 of them were from one person replying to the same tree mail. 2 of them were from the other person.
So you must have two different tree mails going on right now and it seems the emails originate because of replies to them. Said another way, it looks like you got 6 replies in the last 24 hours and each reply triggered an email.
The emails were all sent yesterday evening between 6pm and midnight central time.