Quite often, your total population/culture may differ to your city in game. Here are some common reasons as to why this may have happened:
- Building or upgrading a building in game will consume the requirements instantly but will only reward the benefits once it has completed. For example, an upgrade to level 10 will still only give the benefits of level 9 during the upgrade process. Try to only compare city stats when you have no builders active.
- Ensure all the necessary buildings in game are connected to the correct street. The city planner will still give a building's benefits if not connected to a street, which is not true for in game mechanics.
- Verify you have built the correct event buildings. Despite them not having levels, they do differ depending on the chapter your were in when you first obtained them. Hover over the building to check its values, and if incorrect choose again from the Build menu but make sure you have selected the correct chapter.
If you are still experiencing differences then you are more than welcome to contact me. Please make sure that you include a link to your city plan (created from the Save menu) and the expected values.