The levels of the oceans are subjective at best. Mean Sea Levels (MSL) are a product of a variation in tidal flows from mean high tide and mean low tides averaged. Since the earth is a living thing, heaving, settling, cooling, growing hotter, shifting, pulsing and burping constantly, the levels of the land masses are shifting constantly as well.
This is why these studies are all basically conjecture on the part of scientists that don't want their studies disputed by common sense! These global warming guys are all thinking that if A occurs then B is the result! They have an agenda and no other hypothesis is plausible in their over educated, ego maniacal world!
As the earths crust cools, the land sinks a bit! Since the eastern seaboard is the elder brother to the west coast, it would stand to reason that is sinking at the same time the west coast is rising due to tectonic plates moving along the very active fault lines that cut through the western states. Sure, we have seismic issues on the east coast too but not nearly as violent or catastrophic as the west.
Again, offered with no scientific evidence to support this information! As Crusader suggested, most of this information is being dealt by questionable authority that has already been admonished by the scientific community. They're a dedicated group who will not go away until they've given the earth back to the friggin dinosaurs!