Bugs in content types

Moodle 3.1, Columns - drag and drop

In the last exercise in the attached columns module, there are 11 drop zones. When you get all of them correct the score displayed says 11/14.

What's going on here? I've tried playing around with the behavioural settings - even 'one point for task' means it gives you 0/1.

Please see attached module (go to the end) and screenshot.

Thanks.

When a document is exported from the Documentation Tool, I'm seeing the text "undefined" appearing at the bottom of the page.

Although the content was created using the WP plugin, I've uploaded the H5P content to .org here as well, at this link:

https://h5p.org/node/222611

Hello

After trying to modify (or create) a content, My COnsole (F12) displays this error

Ajax request failed

h5peditor.js?p6zidi:147 {readyState: 4, getResponseHeader: ƒ, getAllResponseHeaders: ƒ, setRequestHeader: ƒ, overrideMimeType: ƒ, …}

h5peditor.js?p6zidi:148 parsererror

h5peditor.js?p6zidi:149 SyntaxError: Unexpected end of JSON input

    at JSON.parse (<anonymous>)

    at parseJSON (jquery.js?p6zidi:2)

    at Fn (jquery.js?p6zidi:4)

    at k (jquery.js?p6zidi:4)