Did Square Enix underestimated FFX|FFX-2 Vita Sales?

[xytherion]

A quick browse on twitter "vita ff10 lang:ja" and some news sites  and you'll see people expressing their interest on buying the Vita Version but was not able to because it was sold out already in stores.

Also worth nothing that the PS Vita Version only placed 4th in the recent Tsutaya Sales Ranking

1. Final Fantasy X|X-2 HD Remaster – PS3
2. The Legend of Zelda: A Link Between Worlds -3DS
3. Pazudora Z – 3DS
4. Final Fantasy X|X-2 HD Remaster – PS Vita
5. New Dinasty Warriors Gundam PS3
6. Pokémon X – 3DS
7. Pokémon Y – 3DS
8. Super Mario 3D World – Wii U
9. Drakengard 3 – PS3
10. Final Fantasy X HD Remaster – PS Vita
11. Monster Hunter 4 – 3DS
12. New Dinasty Warriors Gundam – PS Vita

So...do you think Square Enix underestimated Vita Numbers? There seems to be alot of miss oppurtunities in this problem.