webfm looses order in page fields

I created a new page type "wikipage-general", and rearranged the field order in admin/content/node-type/wikipage-general/fields.
When you do this, on the node the "Webfm attachments" field jumps on top of the node and it's not possible to get it to another position.
You can still rearrange the fields in the admin page, but this rearrangement isn't reflected on the real page.

This is very annonying. It starts with the (I think) second rearrange of fields, or when you rearrange the WebFM field, can't find an exact pattern.