@ciane Thanks for that. I have tried changing the lot name and description. I always clean out my folders as soon as any uploads/downloads are complete. Otherwise it is just too much chaos. I'm pretty sure I haven't used any items from your list. But, I may try removing the furniture anyway. Or at least the clutter that is in the attic, since that has quite a few store and EP/SP items. I did have the same problem with some other lots, but they have all since been successfully uploaded without being edited.
(EDIT: Hmmm, or were they? Come to think of it, when I went into all my lots to take pics for my posts over on my build thread I noticed a lot of little details that I wanted changed. So maybe those properties did end up edited and that is why they then worked.)
But I haven't tried to upload the house since the maintenance the other day. I keep getting side tracked. Maybe it has resolved itself somehow. Otherwise, I may just push the rebuild that repairs the basement up on my list. This will create a whole new lot completely unique from the original. Even if I furnish it, the odds are that I will choose different furniture, since it was mostly chosen at random.