I get the same bug -- both cases, where builds load wrong, and save wrong.
I especially get weird loads if I ever removed slots while making a build. If I place all the slots and fill them, no problem. But if I change my mind along the way, remove some, and put them elsewhere, then both copies of the slots show up when I load the build (sometimes giving powers multiple rows of slots, as they go over 6 total).
Currently, none of my newly saved builds show up in My Account, as if the page simply got frozen one day. My public profile, however, does show new characters. It does not reflect any updates to those characters; the first build I save is it forever.