I am sure there is an explanation. Anyway, so far nothing has happened...
Spain got cores on:
- former Aragon provinces of Valencia, Aragon, Catalonia, Gerona (and the second core on Navara - already had it); perhaps it was from event? If not, perhaps it is "natural" Spain to have them? If not, than she should have waited some time to inherit Aragon...
- cores on Mantua, Istria, Dalmatia and Ragusa; all former Venetian provinces, all former Venetian cores, but NOT part of Venice when traded.
Spain gave to Venice in exchange for above mentioned provinces cores on Messina, Sicily, Sardinia and Malta.
After thinking a bit about it, is there really something so wrong with it, especially since we all have CBs on each other through capitals?
If we allow territory selling, than surelly we should also allow sell of some papers giving mere RIGHTFUL CLAIMS on some land...
Venice and Spain simply exchanged RIGHTS to be called monarchs of 4 provinces, no? The fact that Venice also got the mentioned provinces from Spain, while Spain still isn't recognised as a rightful owner by the current owners (Genoa, Bosnia, ...) is either calculated in the deal, or doge of Venice was again cunning and succeeded in tricking Spain

.