Hello,
I have the same problem. The schematic that i download seem's to be quite big by the way, the GalleonGoldenSwan schematic is 1428ko, while schematic usually do less than 100Ko.
Edit : i have redownloaded this schematic :
http://www.planetminecraft.com/project/ ... r-1969475/ that i still have, the file downloaded a few days ago was 8ko, the file downloaded today is 627ko. Something is wrong.