I have done a work around to fix the second icon in the couple's profile
To create a single avatar for a couple's profile do the following:
1) Go to your /templates/base/thumbnail_couple.html and open in HTML or text editor. Do FILE...SAVE AS and rename file to thumbnail_couple_orig.html
2) Now that you have a copy of the original thumbnail file, open up /templates/base/thumbnail_single.html in an HTML or text editor. Do a FILE... SAVE AS..... and name the file as thumbnail_couple.html and if you are prompted to overwrite the already existing file, reply YES since you already have a copy.
3) Upload the 3 files to your website, overwriting at the prompt :
/templates/base/thumbnail_couple.html
/templates/base/thumbnail_couple_orig.html
/templates/base/thumbnail_single.html
4) Now open /modules/boonex/avatar/include.php in an HTML editor
look around line 10-13 for the following:
define ('BX_AVA_W', 64); // avatar image width
define ('BX_AVA_H', 64); // avatar image height
define ('BX_AVA_ICON_W', 32); // avatar icon width
define ('BX_AVA_ICON_H', 32); // avatar icon height
Change the values of BX_AVA_ICON_W and BX_AVA_ICON_H to be 64 instead of 32.
upload the file to your web server overwriting existing file.
THAT WAS IT!
Now this will not change the sizes of currently displayed couple's avatars, but once they to to their photos section and re-set the avatar from the already uploaded file, it will not appear as the proper large 64px by 64 px icon with only ONE displayed for a couple's profile!