Assembly Build | Negative Quantity in Saved Search

Greetings Community, I would like to understand the the logic behind Quantity shown negative for some Assembly Build Items in Transaction Saved Search.

Please look at this simple example:

For Assembly Build Transaction:

these Components are used:

Now in a simple Saved Search:

This is the output:

As you can see the ones I highlighted as Red are shown Negative Numbers. What would be the reason behind that?

To anyone wondering, **** Items **** are just for Description purposes:

Please let us know of underlying reasons for this.

Thank You and appreciate you looking into this :)