STS - Locks lower level nodes when planning has been started

HI there,

I have 2 leaf level nodes in my STS hierarchy which for some reason are getting locked with the message 'Locked data through STS', this message usually occurs when they submit, but these users have not submitted and no one above them has done any activity, these leaf level users should be the first to enter data. It only happens for 2 leaf nodes, the others seem okay.

Sounds a bit funny I know, does anyone have any ideas?

Thanks

SMS