Sub Accounts not showing on Profit or Loss

Hi,

I have been making changes of the layout of my profit or loss using sub accounts to classify the different areas of a specific enterprise - no I don't wish to use classes before this is suggested. 

This was working well, until last night, when for some reason the sub accounts stop showing as sub accounts when displayed on the profit or loss. Some do and some don't (however, still does on my detail Profit or Loss). I have cleared the history and tried the different browser fix, but nothing works?

Any direction would be useful, I need to have produced something by tomorrow and now kind of stressing. 

Many thanks