Playing as Guest

Hi
I played as a guest today and have subsequently logged in (same machine, browser session, cache etc) and cannot see my setup. It is still listed on the scoreboard but I can't see the words I've already added. I did rearrange to get the best word (which I already had as a guest - but that is necessary to change from guest to username I think?) Hadn't saved the particular setup so if I wanted to continue adding to my current score, it would now mean adding in all the words previously entered as a guest. I have logged out/in and refreshed. I'm fairly sure that never used to happen - maybe I'm missing something obvious?
Also, a piece will 'disappear' sometimes when rearranging - sometimes just part of a piece. Nothing serious - just worth mentioning while I'm here!!