I,ve never experienced this problem. Last day of March I relisted 30 items at around 11.30 pm. without any problems and regularly leave it until the last 10 or 15 minutes. ( Yes I,m organised ) 

Different accounts are definately handled in different ways by ebay. This includes options offered, page layouts etc. What some people see, others dont. Some people experience problems that others never see.

My two stores are both the same catagory, but one has the postal code system which can be bulk edited, the other requires postage cost to be entered for each item individually, no postal code option anywhere. The systems for loading photos are different too. I have searched everywhere, but cant see the different systems offered as options. ( yes I know about the basic uploader facility, but that is different again ) Its only when you have several accounts that you realise not every account holder sees the same thing.