Actually, they are not combining <i>code points</i>.  Take for example the character 𪚥 (4 dragons).<p>The codepoint is U+2A6A5, but in UTF16 it requires combining 2 utf16 <i>characters</i> (\uD869 and \uDEA5) in order to reference it.<p>The codepoint however is still exactly the same (U+2A6A5).