Why a playlist keeps its order and favorites do not
A playlist is a list, so its order is part of it and travels with it. Your favorites are not a list, they are a collection sorted by the date you added each item, and that date is set by the service at the moment it receives the song. We can hand over your music, we cannot hand over a past date with it.
So a favorites transfer arrives as a block, all stamped with today, and each service then sorts that block its own way.
What you will see instead
Every service decides how to display a collection, and none of them asks us. Some show the newest first, some fall back to the artist name, some group by album. Sorting options exist in most apps, and they apply to what has arrived.
One consequence surprises people: your whole musical history can end up looking like it was added on the same afternoon, because from the destination's point of view, it was.
Frequently Asked Questions
Does this depend on the service I move to?
No, it is the same everywhere. No service lets an outside app set the date an item was added, so the limit holds across all of them.
Would a paid plan keep the order?
No. A plan changes how much you can move and how often. It cannot add something to a service's rules.
Can I transfer in small batches to control the order?
In theory yes, in practice it is not worth it. Items added within the same minutes often come back in an order the service chooses anyway, so the playlist route is the reliable one.
My tracks are in the wrong order inside a playlist.
That should not happen, a playlist keeps its order. Check that the destination is not sorting the view by title or artist, and if it really arrived shuffled, tell us which playlist.