BuddyPress.org

Looking at the current HTML structure of your Members, Groups and other BP template files, each is missing some original theme divs which add background color and padding. You removed the div.padder container from BP templates and then added a new div#bp-block around the item-list-tabs to try to contain it.

Recommend the following:

1.Add back the opening div.padder and closing div per original BP template files

2. Remove the #bp-block container div you surrounded div.item-list-tabs with

3. Add the following to your stylesheet to compensate for the missing divs
`/* BuddyPress Mods */
#content div.padder {
background: #eee none;
border: 1px solid #ccc;
clear:both;
font-size: 9pt;
margin: 0 0 10px;
padding: 15px;
}`

4. Use the BP style modifications used in Twenty Ten Child theme for BuddyPress https://codex.buddypress.org/theme-development/theme-dev-bp-template-pack-walkthrough-twenty-ten-bp-1-5/3/

5. Adjust style to taste.