What happened here?

So I imported the same deck from here  onto my ipad, and then instead of syncing decided to download the same thing onto my desktop.  I figured that would be faster than uploading to ankiweb from the ipad and re-downloading to the desktop.
Weird thing is I seem to have gotten two different totally different results on the two devices and i'm not sure what happened. 

My ipad added cards to Japanese corePLUS and raised the number of facts to 25,635.
My desktop made a new deck when it imported (like it should have unlike the dumb ipad) called "Core 10k sentences", but this deck only has 9567 sentences. 

How the heck did I end up with 25,635 on the ipad download?  I don't understand where all these extra facts came from.