Last week I attempted to do a plain vanilla SDC thru the desktop website check-in process, non-stop to a later non-stop. V fare ticket with V9 on both later flights that day. Often the website can handle these straightforward SDCs correctly, yet dl.com showed $200 fee to change for each option. It was no hassle whatsoever to call in and SDC, but it does make me wonder if the agents system is prone to same errors as the website.