i\'m currently having a nightmarish moment with Sitecore. Basically my issues are two-fold:
1) the first time i added a standard value item to a template, and added
Sounds strange... usually this only happens, when you have a "conflict" between layout set on Standard Values, template/branch.
Basically the way to do it is set layout on the Standard Values, which should update all items, that haven't had their layout overwritten on the item or by a branch.
I really dislike branches, so always try to avoid them (the only real use when they were Masters were for building hierarchies of items).
Could you try to look in the __layouts field (View > Raw values) of the items and see if anything is entered there?
And is it only some items or all items based on that template?