Nope. You're asserting that metamagicked spells are different. You'd best back it up.
[URL said:http://www.wizards.com/default.asp?x=dnd/glossary&term=Glossary_dnd_knownspell&alpha=K[/URL]]known spell: A spell that an arcane spellcaster has learned and can prepare. For wizards, knowing a spell means having it in their spellbooks. For sorcerers and bards, knowing a spell means having selected it when acquiring new spells as a benefit of level advancement.
One does not have metamagic feat altered spells in one's spellbook, nor does a metamagic'd version of a spell need to be selected by a Bard or a Sorcerer as part of acquiring spells on level advancement.
To your other note, the text is "3rd level". Interpret that for me without context.