The first is chain break. As you drag a body part, like the hand, it may move a chain of parts, like the forearm, shoulder, collar, chest, etc. If you add one of those to a body part, then it won't move that part. So if you add one to the collar, and drag the hand, it won't move the collar or chest but will the forearm and shoulder.

The second looks like you have bending turned off. You can turn it back on in the properties dial.

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