When a crafting tree satisfies the following conditions

• some item I is present in two or more locations,
• I is crafted in batches of more than one, and
• one of the later occurrences of I is partially or completely satisfied by the remainder of an earlier occurrence,

the item count in the generated pseudo-bookmark for I will be too low by the total amount of items that "craft I" steps take from previous such steps in the tree's iteration order.

Note that the Plastic Circuit Boards are used one at a time and I have none in my inventory but the pseudo-bookmark only lists a requirement of one.