Wow, Pauline, thank you very much for checking your other layouts. You help make my job a breeze.
Honestly, I don't think it's only on your end. I've been encountering other layouts that are missing credits, and it happens to me a fair amount, too. Someone on the GS staff told me that she doesn't add the credits at first. She chooses the gallery where she wants her LO to go and enters the title. Then she clicks. When the second window comes up, she adds the credits then and clicks again. It seems to work for her, and I've tried it a couple of times and all goes well. Give this process a shot if you keep having trouble. In the meantime, I will contact the person who oversees this module (or whatever it's called). Thanks for your patience.
That's what it is ... a gremlin or a glitch ... either way, it's a pain. I will report that the program is still misbehaving. Thanks for your understanding.