You have a COLUMN DISABLE page over-ride set in the following file:
tpl_main_page.php
I see you are using the COLD STEEL template.
So, the file you need to look at is probably here:
includes/templates/cold_steel/common/tpl_main_page.php
Find this line (probably near line 43):
// the following IF statement can be duplicated/modified as needed to set additional flags
if (in_array($current_page_base,explode(",",'login')) ) {
$flag_disable_left = true;
}
... and remove the word login from the code:
// the following IF statement can be duplicated/modified as needed to set additional flags
if (in_array($current_page_base,explode(",",'')) ) {
$flag_disable_left = true;
}