After editing the amount on a planned gift, you might notice that the original amount on the planned gift record incorrectly shows the new amount instead of the original planned gift amount.
This Original Amount differs from that of the one that exists on Payments.
This field is used specifically to show the difference of amount when setting the vehicle as Charitable remainder unitrust. When this vehicle is used users will get an Additions tab. From there, if you add an addition, the amount changes on the planned gift but the original amount stays the same.
Steps to Duplicate
1) Add a new planned gift with the status of Accepted. 2) Add the planned gift as revenue. 3) Edit the planned gift record (not the revenue record) to change the amount and the date. 4) Notice that the original gift amount field on the planned gift shows the new amount and the new date.