Karabiner rules elements

karabiner.json

                    {
                        "description": "Left shift -> {",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "left_shift"
                                },
                                "to_if_alone": {
                                    "key_code": "open_bracket",
                                    "modifiers": ["left_shift"]
                                },
                                "to": {
                                    "key_code": "left_shift"
                                },
                                "type": "basic"
                            }
                        ]
                    },
                    {
                        "description": "Right shift -> {",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "right_shift"
                                },
                                "to_if_alone": {
                                    "key_code": "close_bracket",
                                    "modifiers": ["right_shift"]
                                },
                                "to": {
                                    "key_code": "right_shift"
                                },
                                "type": "basic"
                            }
                        ]
                    },
                    {
                        "description": "Left shift + right command -> [",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "left_shift",
                                    "modifiers": {
                                      "mandatory": ["right_command"]
                                    }
                                },
                                "to": {
                                    "key_code": "open_bracket"
                                },
                                "type": "basic"
                            }
                        ]
                    },
                    {
                        "description": "Right shift + left command -> ]",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "right_shift",
                                    "modifiers": {
                                      "mandatory": ["left_command"]
                                    }
                                },
                                "to": {
                                    "key_code": "close_bracket"
                                },
                                "type": "basic"
                            }
                        ]
                    },

This seems to lead to some odd behaviour...