I have my email account set with the order being descending date of arrival and the messages are unthreaded. However, every time I get a new message in the account, it appears at the bottom of the list of messages. I only made one change to my email in Thunderbird when this started happening. Prior to me setting up a filter to search for amazon.com messages and direct them to a separate folder, the messages all appeared on top, in the correct date order. After, they appear on the bottom, even if I change to another folder or different email address and come back, the message is still at the bottom. It is like when you have a folder open in Windows browser and then you save or modify files in that window, they reappear on the bottom. Closing the program (like if you close a window) and reopening it causes the new message to appear where it should be. However, that is a substantial inconvenience. I have Thunderbird monitoring nine other e-mail accounts at present. None of them have a message filter. All of them show the email at the top of the page. New messages to my primary account appear at the bottom of the page even when I have Thunderbird showing the inbox of one of the other email accounts. Using Windows 10, Thunderbird 115.10.1 (64-bit). Any assistance would be appreciated.