By nature, the exposures and the charts on your profile could be more static than the rest of the information - but that's not always the case.
It's quite possible that you will need to update some of the numbers, and this articles describes exactly how you can.
Go to 'Exposures and Holdings' tab.
Go to the chart you need to update, and click on the pen to top right of the box (the edit button)
When you are there, click on the Data present link, just below the 'upload amended data'. (If it's a new chart, then click on the Download Data template).
Open the file you just downloaded, update the data as needed, save the file. (make sure that you use exactly the same format!)
Click on the 'Upload Amended Data' and choose the file you just saved.
Make sure the privilege level and the date is according to your needs.
Click on the 'preview' button to get a feeling of how this will look like.
Click 'save'. You are finished!