"Also, if you read the base use of the Bind power it say the use may spend FPs to immobilize the target. Therefore, the user is not required to immobilize the target."
Actually, no. Because the term may is before the entire clause of the base power, it means you may spend a force point to activate the power as described. You also may choose not to use force points to activate the power, in which case, you do not activate the power at all. You can not pick and choose how the power works, the only choice there is to activate it or not. The reason it is written with the word may is so that the user is not forced into using the power with dark side points if they are a light side user, or vice versa.
I disagree. While, obviously, you need to spend the FPs (at least LSP) for the base power to get to the upgrades, that does not mean you necessarily have to immobilize the "target" of the power if that isn't your intent . This is the same as with Influence . If the purpose of using that power is to activate either the "social checks" upgrade or the "emotion" upgrade, you're not using it to cause strain on the target. Thus the same logically holds true for the Bind movement upgrade. You're activating the power to push or pull the target, not necessarily immobilize him. Thus, you do not have to immobilize the target to use Bind to push him or pull him one range band.
The "move" Control upgrade looks to be special. As is the case with many Control upgrades, it provides a different way to use the power. It looks to me that you can use it to move your target further from, or closer to, you (whether or not you activate the Basic power). But the other Control upgrade, the one that makes your target suffere strain when he performs an action, that one requires a target currently affected by Bind...so he needs to be immobilized by the Basic power for that Control upgrade to work.
Exactly.