Why does Python act like my dict is a list?

I'm trying to create a sorted dict class as a way to mess around with dunder methods. I know collections.OrderedDict exists.

When I try to overload __getitem__ or __setitem__, Python acts as if I am trying to index a list with a string key. Here is my code for the class:

class SortedDict:    def __init__(self, **kwargs):        self.map = dict(kwargs)        self._sort()    def __str__(self):        return str(self.map)    def __getitem__(self, key):        return self.map[key]    def __setitem__(self, name, value):        self.map[name] = value    def keys(self):        return self.map.keys()    def add(self, **kwargs):        for key in kwargs:            self.map[key] = kwargs[key]        self._sort()        indices = dict()        for key in kwargs.keys():            indices[key] = self.index(key)        return indices    def remove(self, *args):        for key in args:            self.map.pop(key)    def index(self, key: str):        keys = list()        for dict_key in self.map.keys():            keys.append(dict_key)        return keys.index(key)    def contains(self, key: str):        return key in self.map    def _sort(self):        self.map = sorted(self.map)

When I execute the following code to test __getitem__:

from sorted_dict import SortedDicttest_dict= SortedDict(test1=1, test2=2, a=2, b=3)print(test_dict['test1'])

I get this error:

Traceback (most recent call last):  File "c:\Users\Chris\Desktop\Code\DMC2\mapping_editor\tree.py", line 16, in <module>    print(test_dict['test1'])  File "c:\Users\Chris\Desktop\Code\DMC2\mapping_editor\sorted_dict.py", line 11, in __getitem__    return self.map[key]TypeError: list indices must be integers or slices, not str

I get a similar error when trying to use __setitem__. I am using VS code, and when I hover my cursor over self.map in either of those functions the type is shown as dict[str, Any] | list[str]. If I print the type of self.map in either of the functions, it prints <class 'list'>, but when I print the class of self.map in the constructor it prints as <class 'dict'>, which is what I would expect. When I print self.map in the __setitem__ or __getitem__ functions it prints as a list of the keys, but in the constructor it prints as a dictionary would. What am I missing?