Published infopath form not updating
As the files render in the Explorer window, you will see the icons next to the file names change to the Info Path icon. If you have a lot of files, you can scroll down to expose the ones that have not changed yet.When all the icons have rendered, shut the Explorer window and refresh your view, you will see the promoted columns contain the data that was in the form. – use the “Relink Documents” action on the view menu.) The solution is deceptively simple and I don’t even know why it works, but it does.
Separately I've found that most form libraries with issues on publishing form templates, all seem to have multiple files in the library and many different files that are unlinked from the current template.
The most common response is that if you remove some columns for your Info Path List, it will magically work.
What I've discovered for this ready why this actually works is because you're falling within the Timeout window.
It will work to update the forms and the data will show up in the promoted columns, but if you have workflows connected to the form, THEY WILL RUN.
I have followed the instructions at upgrade an infopath form in SP2010.