The screen shot shown is for a Sub-project. The data for this is not coming from the Tasks, but from the Project % Complete.
Are real tasks being shown with 8 decimal places?
The Project % Complete is also defined as 2 decimal places (at least in the environment I looked at), but is stored on the database as what looks like 17 decimal places. In the environment I looked at (V15.5) it displayed this data as two decimal places in the UI.
I don't have access to V14.4 environment to repeat, but, you may be experiencing a 'challenge' when looking at sub-project from the task view.