I'll try to be a bit more specific, well kind of.
Someone has a shopping list, next to it the cost with the running total autosumed at the bottom.
The bread for $1.60 is listed, but somehow, the autosum total is total minus the $1.60?
Can this in someway be a program error, or does it need to be manually done ?

And yes in response to private message, you did know well.