Same here, but I think it's spilage. They also work on usage updates from SAIX... so it's very possible to exceed your cap. Don't think that they will relax the cap...
cap upgrade for ex 2gb and 3gb users to 3 and 5 respectively as at September 2009, all 1 gb stayed 1 gb. NB local cap usage did not change 30, 20, and 10 gb for "free"