Tim over at the RevitCat has put together a nice writeup on component stairs, and specifically, landings.  Some of you may have struggled to place a landing at the top of a stair flight – particularly when dealing with multistorey stairs.  Along with other tips, Tim shows you how…

Here is the key to the workaround:
Place an extra run at the top so that Revit creates an automatic landing; then delete that run – the landing will remain, but will be converted to a sketch based component

Read the whole post:
http://revitcat.blogspot.com/2014/01/revit-stair-landings-part-1-creation.html