900 W model, The lid with blade no longer screws onto large cups.

900 W model, The lid with blade no longer screws onto large cups.

Only 2 weeks old, I used it a couple of times with no problem and cups and blade were put in dishwasher. Then today I can no longer screw the blade lid onto the large cups. It appears that the cups are now too big. The small cup that I hadnt used much works fine. I wonder if it is dishwasher damaged?.