I did a Google search for "lastpass change order of autofill" and here are the top 4 links:viewtopic.php?f=7&t=107565viewtopic.php?f=12&t=217185viewtopic.php?f=7&t=143565viewtopic.php?f=12&t=214395
All four are for forum threads here where people have asked variations on the same question. And apparently there used to be a FAQ entry on it, so instead of answering the question, in every case helpful forum users have provided a link to the FAQ:https://lastpass.com/support.php?cmd=showfaq&id=2185
But at some point since 2016, the FAQ page was removed. So now that link just goes to a generic "we're here to help you" page. Not so helpful.
I'm sure that FAQ entry is not the only one brokenly linked from the forum. It would be nice if someone at Lastpass could search the forum for dead links to your own documentation and update it with correct links, whatever they are now.