Why does scrolling my mouse wheel cause multiple lists to load?

Overview

If your mouse has a scroll wheel and your PC is configured to use it, then when a drop-down box is selected in the Windows Batch Sender (such as 'Manage Lists') then the scroll wheel will scroll through them when used.

What causes it?

Whenever a list is selected in certain drop-down boxes in the Windows Batch Sender, such as 'Manage Lists', the list will be automatically loaded. This can be inconvenient as the Windows Batch Sender may try to load several lists, one after another, if the mouse has 'wheeled' over them. If a list has only partially loaded before another one begins to load, or if the wheel event causes the application to move to a different tab, the Windows Batch Sender may produce an error alert.

How do I fix it?

The best way to fix this error is either to avoid using the mouse wheel whilst using the Windows Batch Sender, or else to disable it in your mouse settings under Control Panel.

Alertnatively you can continue to use your mouse wheel and if this problem occurs, simply wait for the application to finish loading and disregard any errors or warnings which appear.