The problem is with the new update. It used to be that if you were increasing the number of items to be bought or sold there was a sort of exponential increase in the speed of the increase in units. Something like 1, 1, 1, 5, 5, 10, 10, 100, 100, 100. It only took a few seconds to scroll up from 1 to 700 plus. Now the increase is just 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1. It takes a loooong time to scroll up to 700+ units. It needs to go back to the old system.
Also, it used to be that if you were buying that you could not scroll up past the number of units that were available for sale. This is not the case presently. So you must note the exact number available and scroll that high but no further. If you go over, it just will not process the sale but does not indicate anywhere that you are trying to buy more than that are available.
The addition of some "All available units" buttons so that you could just sell all or buy all would be great too.