These TCG rulings were issued by Upper Deck Entertainment and have since been deemed unofficial by Konami. They were previously considered official and can still be correct, as long as they follow the official gameplay rules, or unless Konami has issued a ruling that says otherwise. References: 
You can move "Snatch Steal" with this card’s effect, and it will affect the newly equipped monster (the controller of "Snatch Steal" gains control of it, and loses control of the previously equipped monster).
If multiple Union Monsters are going to be equipped to 1 legal target monster by "Collected Power", you select 1 of them and equip it to the target monster, and the other Union Monster Cards are destroyed.
Mentions in Other Rulings
Armed Samurai - Ben Kei: Even if "Armed Samurai Ben Kei" is equipped, attacks twice, and you use "Tailor of the Fickle" to move its Equip Card to another monster, and then use "Collected Power" to move it back, "Armed Samurai Ben Kei" has already attacked twice and gets no additional attacks.
Ekibyo Drakmord: If control of a monster equipped with "Ekibyo Drakmord" changes, the turn count resets. If "Ekibyo Drakmord" is moved by "Collected Power"...to another monster, the turn count resets.
Gearfried the Swordmaster: The effect of "Gearfried the Swordmaster" activates when 1 or more Equip Card(s) are equipped to him. So even if "Collected Power" equips several Equip Cards to him simultaneously, you can only destroy 1 monster with his effect.
Scroll of Bewitchment: If you switch the target of this card with "Collected Power"...you do not select a new Attribute. The newly equipped monster becomes the Attribute that was originally selected when "Scroll of Bewitchment" was activated, even if it is the same as the monster's original Attribute.