In regards to the blue login button. You can remove this by opening up your Vertex admin panel (templates > styles > select theclassifieds). Then go to the "general" tab and remove the text for "login" then save and it should disappear.
Add this to your custom.css file for decrease in the header area:
#s5_totalwrap {
float: right;}
#s5_noiacf_wrap {
height: 95px !important;}