Net Profits daily change wrong

When I scroll through my net profits graph the Daily Change %'s displayed are just wrong, to the extent that sometimes a rising net profit is shown as negative change and vice versa. Occasionally some seem correct, but this must be a simple calculation and I dont understand how this can be.
Also on the subject of net profits, it seems that they are only calculated daily, is this correct? Why would this be given that it can have a nice smooth holdings curve so the data must all be there.
Thanks in advance

Thanks for bringing that to our attention. I have created a bug for it and will keep you posted once this is fixed. I appreciate your time and patience.

Do you know who could fix it? You can earn $5,000 by referring someone here: ACCOINTING.com Referral Program: Earn $5.000! - Accointing.com