The items shown on the timeline can be ordered on different dates like the created date or modified date while currently only for the entities where the card form is available (like task, email, phone call, ...), the created date can be shown on the timeline. For all other items (notes, case resolution, ...) that can be shown on the timeline, the modified date is shown by default. This is causing confusion as the items are ordered on a specific date while in the UI you might see different date values and the order is not making sense in the UI.