Clicking on a checkbox inside a block quote toggles the wrong checkbox

[mattjweiss]

The following will render, but clicking on checkbox 1 will unexpectedly update checkbox 2.

If you start with this:

```ad-note
> - [ ] checkbox 1
- [ ] checkbox 2
```

Clicking on checkbox 1 will give you this:

```ad-note
> - [ ] checkbox 1
- [x] checkbox 2
```

If there is only one checkbox, nothing appears to be toggled at all.

```ad-note
> - [ ] checkbox 1
```

becomes...

```ad-note
> - [ ] checkbox 1
```

This appears to apply to indented checkboxes as well.

In this example...

```ad-note
- [ ] checkbox 1
	- [ ] checkbox 2
- [ ] checkbox 3
```

Clicking checkbox 2 updates checkbox 3, and clicking checkbox 3 does nothing.

[mattjweiss]

Also, putting a bullet point in the title of an admonition indents the icon for some reason.

```ad-note
title: - Title
```

Block quotes have unusual behavior as well. The first > appears to include the icon but the following ones do not.

```ad-note
title: >>>> Title
```

[tymek115]

Clicking checkbox 2 updates checkbox 3, and clicking checkbox 3 does nothing.

Can confirm the bug exists and is very annoying ://