APEX

I create a dynamic list with query following the documentations here: https://docs.oracle.com/database/121/HTMDB/nav_list.htm#CACDGDID

My query looks as follows:

select 1         as level_value 
       , m_name  as label_value 
       , m_id as target_value
       , m_img_url         as image_value 
       , 'test' as attribute7
       , '1' attribute8
from   mz_people
order by m_id;

The list template is Media List. I created another copy of the template and used it (so I can play with it).

The list currently looks as follow:

There are two places where I want to display dynamic data from my query but I failed.

1. I want to display initials inside the circles on the left
2. I want to display discription below Person name (The one appears above is hardcoded in the template, more on this below).

First, here is the List Template noncurrent:

<li class="t-MediaList-item  #A04#">
    <a href="#LINK#" class="t-MediaList-itemWrap #A05#" #A03#>
        <div class="t-MediaList-iconWrap">
            <span class="t-MediaList-icon u-color #A06#"><span class="t-Icon #ICON_CSS_CLASSES# u-color #A06#" #IMAGE_ATTR#>#A08#</span></span>
        </div>
        <div class="t-MediaList-body">
            <h3 class="t-MediaList-title">#TEXT#</h3>
            <p class="t-MediaList-desc">The description value is #A07#</p>
        </div>
        <div class="t-MediaList-badgeWrap">
            <span class="t-MediaList-badge"></span>
        </div>
    </a>
</li>

As you can see, I am using #A07# and #A08# as attribute7 and attribute8. But that does not work. I know what I hardcode here appears in the runtime. But the substitution strings (i.e, A07, A08) are just being completely removed, and substituted with empty strings. I tried with all attributes from 1 .. 10, with the same result.  Notice, the template options, I enabled 'show description option'. What I am doing wrong here?