I have been having this issue for years; but lately it seems to be worse. Maybe I am getting old; but I am finding it increasingly difficult to navigate from left to right on your pull-down menus. I pick a manufacturer and try to go to the next menu, but if I am not perfectly horizontal, I lose the selection and have to start over.
- Make the minimum height of the menu items larger to allow more room for error.
- disable new selection on the first menu when the person is moving the cursor left/right on the first menu? If the change in x is greater than change in y for the cursor movement; disable current menu from making new selections until the change in x is less than change in y for a given cursor movement.