Steps to recreate:

• Log into router locally
• Click "Wireless" on header menu
• Click "Guest Network"
• Observe screen

Actual: For a brief moment (<1 second) you see an alternate settings page, before you see the normal settings page. This alternate screen shows a 6GHZ option on it and also second 5GHZ channel. You'll probably need to do a video screen recording and go back to watch it as it disappears quickly.

Expected: You would not see the "alternate" page appear with 6GHZ as this router does not have 6GHZ. You should only see the regular screen below.