That said, many of these "oddities" are disingenuous to the point of lying, many of the error messages are omitted. Or the functionality converts to list before doing an operation. Not that it is good library or language design, but this is a great way to inflate bug counts.
I left out error messages (and occasionally other things) because Twitter.
I don't think any of the ones I put in this moment should be considered bugs. Many of these are core language features.
Lots of the oddities could be explained by
In [1]: list({'a':1, 'b':2, 'c':3})
Out[1]: ['a', 'b', 'c']
In [2]: list({'a':1, 'b':2, 'c':3}.items())
Out[2]: [('a', 1), ('b', 2), ('c', 3)]