There are a few bugs with adding definitions active right now. One of them means that adding definitions and writings/tones/readings together will mean that only one part will show up until you reload the page.
The other, which I just tracked down, is that when adding a new definition item for which you already have the writing item, the writing item will be prompted instead (and you won't see the definition prompt). Same cause.
It will require a bunch of code to fix the root problem, and I'll try to do it by Sunday. Many of you had mentioned this; thanks for the debugging help, all!