Now you have mis quoted me, as I said, "if you fill a cup with ice, THEN add water to the rim" then the ice (because it floats above the surface) will be above the rim, but when it melts it wont overflow, the main reason for this is the oxygen bubbles that get caught in ice helping to expand it, about 12% of ice is air, therefore about 12% of the polar caps is NOT water.

And..... Water expands ever so slightly as it is warmed, but, no where near enough to raise ocean levels by 6 metres or as some same hundreds of metres, certainly not if we are talking 1 to 3 degree's, even if the oceans boiled (100 degree's C) it wouldnt rise that high, it would be uncomfortable though especially in Fiji.