For a brief period the other day, I was able to get to a "select date and destination" screen using my AC, without getting the grid. Now the grid is back. FWIW, I called II and they extended my AC date by a month (I spoke with a supervisor).
Now given the problems w/ my Marriott not seeing weeks online that are definitely there, I may be withdrawing my week so will probably lose the AC if I do that....