h1 and h3 isn't meant to "make your font size bigger" they are used when the text is a heading, and you can use the format dropdown just for that.
the bold command only generates a span if you are using Firefox and have setup the config of the editor to use css and spans, so you can change it back.
RE: bold & h1 etc..
the bold command only generates a span if you are using Firefox and have setup the config of the editor to use css and spans, so you can change it back.