Own widget - allignment

Hello,
I started to try do do my own widget. I have a problem with the alignment.
The widget consists of two lines . Each line has a button and a stepper.
But the components in bot lines are not aligned to each other.

uid: ck_heating_two
tags: []
props:
  parameters:
    - default: RoomName
      description: Room name
      label: Room Name
      name: title
      required: true
      type: TEXT
    - context: item
      description: Aktuelle Tempertur Item
      label: ItemCurrentTemp
      name: itemCurrentTemp
      required: true
      type: TEXT
    - context: item
      description: Soll Tempertur Item
      label: ItemSollTemp
      name: itemSollTemp
      required: true
      type: TEXT
    - context: item
      description: Time 1 item
      label: ItemSollTime1
      name: itemSollTime1
      required: true
      type: TEXT
    - context: item
      description: Time 2 item
      label: ItemSollTime2
      name: itemSollTime2
      required: false
      type: TEXT
    - context: item
      description: Time 3 item
      label: ItemSollTime3
      name: itemSollTime3
      required: false
      type: TEXT
    - context: item
      description: Time 4 item
      label: ItemSollTime4
      name: itemSollTime4
      required: false
      type: TEXT
    - context: item
      description: Soll Temperature time 0 item
      label: ItemSollT0
      name: itemSollT0
      required: false
      type: TEXT
    - context: item
      description: Soll Temperature time 1 item
      label: ItemSollT1
      name: itemSollT1
      required: false
      type: TEXT
    - context: item
      description: Soll Temperature time 2 item
      label: ItemSollT2
      name: itemSollT2
      required: false
      type: TEXT
    - context: item
      description: Soll Temperature time 3 item
      label: ItemSollT3
      name: itemSollT3
      required: false
      type: TEXT
    - context: item
      description: Soll Temperature time 4 item
      label: ItemSollT4
      name: itemSollT4
      required: false
      type: TEXT
timestamp: Dec 27, 2023, 1:49:30 PM
component: oh-list-card
config:
  title: =props.title
slots:
  default:
    - component: f7-card-content
      slots:
        default:
          - component: f7-row
            config:
              class:
                - align-items-left
            slots:
              default:
                # show current and soll temp
                - component: oh-button
                  config:
                    class: margin
                    text: = + items[props.itemCurrentTemp].state + "°C (" + items[props.itemSollTemp].state +  "°C)"
                #- component: Label
                #  config:
                #    text: test
                # stepper to change soll temp
                - component: oh-stepper
                  config:
                    class: margin
                    item: =props.itemSollTemp
                - component: oh-button
                  config:
          - component: f7-row
            config:
              class:
                - align-items-left
            slots:
              default:
                - component: oh-button
                  config:
                    item: =props.itemSollT1
                    text: ="Manual On / Off for "  + items[props.itemManOnTime].state +  " hours"
                    #text: "test"
                    class: margin
                    #color: "=props.colorButton ? props.colorButton : ''"
                    #outline: true
                    #action: command
                    #active: "=props.exampleModeItem ? (items[props.exampleModeItem].state === loop.buttonlabel ? true : false) : ''"
                    #actionCommand: =loop.buttonlabel
                    #actionItem: "=props.exampleModeItem ? props.exampleModeItem : ''"
                - component: oh-stepper
                  config:
                    class: margin
                    item: =props.itemManOnTime

image

I don’t know why the first stepper is not on the right edge resp, why the second stepper is there.

Thank you,
Chris

Delete the second button in row 1 after the stepper