I am guessing that it is just getting confused because you are doing 2 different functions on the same item. I know that if you change the price and remove ALL of them, then the removal take preference. I can put in a report to see if this intentional but I am guessing you can only do one function per item at a time.

Oh I know what you are saying. I am just saying that I don't think that it can do both functions at the same time on the same item because removal will always take preference and ignore the price change.

yeah destiny's right, the price can only be updated if you're not also removing any of them.

Please see above. Locking as this is the intended way!