Elizabeth quietly answered "Undoubtedly;" -- and after an awkward pause, they returned to the rest of the family. Charlotte did not stay much longer, and Elizabeth was then left to reflect on what she had heard. It was a long time before she became at all reconciled to the idea of so unsuitable a match. The strangeness of Mr. Collins's making two offers of marriage within three days, was nothing in comparison of his being now accepted. She had always felt that Charlotte's opinion of matrimony was not exactly like her own, but she could not have supposed it possible that, when called into action, she would have sacrificed every better feeling to worldly advantage. Charlotte the wife of Mr. Collins, was a most humiliating picture! -- And to the pang of a friend disgracing herself and sunk in her esteem, was added the distressing conviction that it was impossible for that friend to be tolerably happy in the lot she had chosen.

1）肯定句中的at all这里表达了什么含义？

2）The strangeness of Mr. Collins's making two offers of marriage within three days, was nothing in comparison of his being now accepted  书上翻译成了：柯林斯先生三天之内就求了两次婚，比起他现在竟被人接受，实在是太奇怪了。

    可我却理解成：柯林斯先生三天之内就求了两次婚，比起他现在竟被人接受，不奇怪。其实我没搞懂The strangeness was nothing (in comparsion of)的含义，麻烦老师指出我的理解错误在哪里？

3）disgracing herself and sunk in her esteem 一个是现在分词，一个是过去分词，过去分词sunk这里表示状态，能理解。对于现在分词disgracing herself是表示“动作”吗？是否也可用disgraced代替disgracing herself 来表示状态呢？