Hi
registration and login section have no bootstrap span . the width of the main component content is 6 span1 so set span6 to the both sections so that they take the entire width space ( to avoid a sort of css inline and have a css block behaviour) .so create 2 rows of span6 . each row are limited to 6 span1
Don't know if managemodule is the way to solve your problem.
regard's
STUDY OF THE TEMPLATE
1) black color : there is many same selector beetween bootstraps selector .
very too many html tag wrapper
2) red color
.span6 > .row-fluid > .span12 . the number 12 seem wrong since it must be < 6 . You havet 2 area so span3+span3 or span4+span2. you can test
www.bootply.com/
3)you use a bootstrap12 grid column with template jsn teki with no easy link to documentation .
www.slideshare.net/joomlashine/jsn-tekiconfigurationmanual
4) I don't see the use of spanx inside row-fluid
regard's
if you have a look to bootstrap 2 !! website documentation
getbootstrap.com/2.3.2/scaffolding.html
you have to insert spanX inside html tag element than contain row-fluid