Joke from Taiwanese election "aftermath"

[Grand Moff Yenchin]

Backround:
1. KMT lost the presidential election, DPP won
2. The KMT opposed referendum was held on the election
3. KMT was very upset of the election results (They're still camping outside the presidential office protesting...)


From the KMT Spokesman:

The total votes on the election are 13251719! (1)
The votes for the DPP are 6471970!! (2)
The votes for the KMT are 6442452!!!(3)
Invalid 337297!!!!(4)
Referendum 7452340!!!!!(5)

Now let's suppose the ones who didn't vote the referendum all voted for KMT!! (1) - (5) = X
Then let's suppose there are people who voted the referendum but didn't vote for DPP!!! (5) - (2) = Y

Now pray, tell me why does X + Y, which is likely the sure number of those who voted KMT, is (4) + (2) ?????!!!!!!!!!!!!!!!!!!11111!!!!!

LOL...