Comcast deleting spam folder contents after one week?!?!

Today I received a message from Xfinity with the subject "We made some changes to comcast.net email settings" Boy did they ever. I have pasted two sentences from that message below in quotes.

"We don't want you to miss any important emails, so we have changed spam email settings for all comcast.net email accounts.
Beginning this week, all emails sent to your comcast.net email account that are categorized as spam will now be stored in your spam folder for 7 days. After 7 days, those emails will be deleted."

The second sentence contradicts the first. If Comcast doesn't want me to miss any emails why would they delete the contents of my spam folder after 7 days? This is insane. It is doing just the opposite of making sure I don't miss any messages. Trying to figure out their arcane logic, I wonder if they figured that if they delete the contents of the spam folder after 7 days, people will REALLY be motivated to check their email at least once a week or a little more often. I have never been able to figure out the logic of Comcast's spam filter. They filter out legitimate messages and send spam through to me. You would think if you click on "Not Spam" to put the message in the inbox, the system would remember this and not filter out messages from that sender in the future. But that is not how it works. You have to make a filter. Not only that but you have to make a filter that says "Keep" the message AND "move to inbox" for it to work. But THEN you get TWO copies of the message. Please Comcast, reverse this insane idea about deleting spam folder contents after 7 days.

Don