Entering true cost of stock purchase on form 8949

There is a nee process for entering your true cost of purchasing stock on form 8949.   The new process is cumbersome and has software bugs.   The form is supposed to allow you to scroll to the right and make corrections on individual stock sales.   On my MacPro laptop the screen cuts off on the right hand side and does not allow me to scroll to the right.  Also, when selecting an individual line item, I can only use the "Bulk Adjustment Option".  I cannot believe such a common function on a widely used software has a simple bug.  I am very disappointed on a software product I have used over 15 years.