Based on the review of the content in the `datacard.md` and the `games.csv` files, here are the identified issues:

1. **Issue:** Inconsistency in Time Fields Format
    - **Evidence:** The `datacard.md` mentions collecting the "Start Time" and "End Time" for games, implying these should be in a readable date-time format. However, in the `games.csv`, the `created_at` and `last_move_at` columns contain time in Unix epoch format (e.g., `1.504210e+12`).
    - **Description:** The datacard specifies the collection of start and end times without detailing the format. The expectation is that such times would be in a human-readable date-time format. Instead, the times are provided in Unix epoch format in the dataset, which requires conversion to be human-readable and might not meet the expectations of users or applications relying on immediate readability or a specific date-time format.

2. **Issue:** Lack of clarifying details for columns with boolean values
    - **Evidence:** In `datacard.md`, the column "Rated" is described to contain values (T/F) which imply True or False. In the dataset `games.csv`, the `rated` column contains `True` and `False` as boolean values.
    - **Description:** Although the dataset aligns with the datacard by using True/False values in the `rated` column, the datacard could provide clearer guidance on the nature of these values (i.e., Boolean). This inclusion would ensure that users understand the data type and usage of this column without ambiguity, especially when interpreted in programming languages or applications that may utilize different representations for boolean values.

These issues highlight the importance of ensuring datacard descriptions not only match the dataset's actual content but also provide enough detail for clear interpretation and use of the data.