A number of persons have been commenting and complaining about issues with the wedding Cake. A quick search turned up a notification sent out by Zynga. Here is a note from Zynga, the makers of Cafe World.
Updated 03/29/2010 11:17 AM
We are aware of some problems with Wedding Cakes losing some progress, and are currently investigating this issue. Please be patient while our development team looks into the cause of this problem, and works toward a solution.
The complaints centered around, clicks to help not being registered and the progress of the cake not updating or retrograding.
Interestingly, the Cafe was down for maintenance last night and hopefully that was an issue being addressed. Hopefully Cafe World will correct the issues quickly and "allow the wedding to proceed".