Average Soft Credit doesn't take into account partial amounts

When looking at a contact's Contributions tab, the Avg Soft Credits does not take into account that the amount credited to the Contact may be only a portion of the hard contribution total amount.

For instance, the attached screen shot shows a single soft credit of $573.06, but the Avg Soft Credits shows $5,366.00. This amount is the total amount of the hard contribution of which only a portion ($573.06) was soft credited to this contact.

Not sure how long this has been the case, but I've only just noticed it.