They do look pretty and orderly but they do need to be stored horizontally. I’ve been using them for about 5 years and learned the hard way how to ruin them. I have over 60 now and as they’re not cheap I follow the storage rules.
I have been getting OzWord since I first joined now suddenly the last three days like you as much as I try I don’t get the grid, just a blank page. I couldn’t wait until this morning to try and see if it’s fixed but no. Quite sad really