Dapper Query incorrectly maps the entity ID

I have 2 entity classes:

public class PostTag
{
    public int Id { get; set; }
    public string Alias { get; set; }
    public string Name { get; set; }
    public int Level { get; set; }
}

public class PostTagIndex
{
    public int Id { get; set; }
    public int PostTagId { get; set; }
}

I want to draw attention to the fact that both of them have the same field named 'Id'.

Next, I use Query(...) method this way:

List<PostTag> postTags
    = cn.Query<PostTag>(postTagsSql, new { postId }).AsList();

Here is the generated SQL:

exec sp_executesql N'
            SELECT *
            FROM [PostTags] AS pt
            JOIN [PostTagIndexes] AS pti
            ON pt.[Id] = pti.[PostTagId]
            WHERE ([PostId] = @postId)',N'@postId int',@postId=3035

And here is its result:

Id      Alias   Name    Level   Id      PostId  PostTagId
1014    name1   Name1   0       2020    3035    1014
2014    name2   Name2   1       3021    3035    2014

So, the result has two 'Id' columns because of joining and selecting all the columns.

I expect to have the first column 'Id' values put in the PostTag.Id. Isn't it logical? But in fact, it takes the second 'Id' column as PostTags' ids. Of course, I can write SELECT pt.* instead of just SELECT *, but anyway why doesn't it take the very first appropriate column name instead of skipping it?