so now one of my units has gone from the default 100 total to 180 (correct total) - have no idea how. feels like there is a bug - any ideas? also the unit with range 0 - 0 is fixed! i had set an extra credit, meaning it wouldn't add to the total sum.
just come back to edit this post!! THEY ALL WORK!!!
not sure why? here's what i did: changed role to teacher, added grades into a test account for the whole course, updated, nothing, clicked the 'edit calculation for unit 11' (one of the default totals) and hey presto all units are summed as they should be. have no idea how or why, but all is working - sorry i cant be more scientific.
also sorry for turning this discussion into a blog!