I have not had any problems yet, , with postings. I usually set schedule for postings to upload between 6-7 p.m. PST. Also, most of my postings go up usually on Sunday and Wednesday. I try to ship the next business day after payment. With Wed & Sun and using 7 day auctions my shipments go out on Tuesday and Friday, unless they actdually pay Wed/Sun nights. If so shipment goes out Mon/Thur.
More info than you asked for,