Hi Phil

Welcome to the Totara forums - sorry for the delay in responding

When you upload course completions  the course needs to exist before you can upload the completion. If the course doesn't exist then this will be added as evidence rather than to a course. The user also needs to exist and the cousre and usernames match the data.

There is a course import report that will show any problems with the data.

You can upload multiple courses for the courses that you want to bring over.

If everything still looks alright then please provide a few more details on the file that was uploaded.

Regards