Asset Adjustments

When adjusting on 20.3, changes are made to line items that I don't intend. For instance, when deleting a line item that was returned, two other line items were duplicated. On another asset, trying to increase value by $500, total value increased by $7,800. Can anyone help me understand why this is happening? To correct it, I have to look up every invoice listed to see what SHOULD be there and it is very time consuming.