Hello,
Already have made all the process that you describe on you post and everthing in this post.
The formats extension are descriminated in the image atached.
I can upload 1st house "main photo" in jpeg but, then no houses more acept "main photo" in jpeg...
Lately, I had upload the "main photo" in PNG format but it´s start to be no solution because is a large file and puts the site slow and with no space in the webhosting contracted by us...