Far tp Horse stacking player error

First,

/summon EntityHorse 999 63 36 {NoAI:1, Invulnerable:1}

Second, ride a horse and tp horse to far away.
ex)

/tp @e[type=EntityHorse,c=1] 0 80 0

Then you can see that you are standing but you cannot move, and you cannot see horse.

Proof Video
http://youtu.be/LYL_mt9_yuQ