Incorrect Display/Calculation of Order Total

I have entered a purchase order with the following prices:

Price after Tax    Line Total
--------------------------
110.1924               110.19
  71.25                   71.25
  13.2924                26.58
  54.15                   54.15
  76.95                   76.95
  57.00                   57.00
  79.80                   79.80
   0.02                     0.02
--------------------------
Amount Total         475.94
--------------------------

However, when I go to "Outstanding Purchase Orders Maintenance", the "Order Total" for the above order is 475.95. If I click on "Receive", the "Sub-Total" and "Amount Total" on the "Receive Purchase Order Items" page 475.95.

If I go to the "Modify Purchase Order" page, the "Amount Total" is 475.94.

Why is the Receive page calculating the total differently from the Order page? Is it because some items are entered with 4 decimals?

The total to 4 decimal places is 475.9472, so the Receive page is displaying the total amount correctly.