Im not understanding todays 'Take a friend for $4' sale!

Trying to do MEL-OOL X2 Adults (JQ Light $46.50 Per Pax)
Coming up Total of $186.00

I dont understand!

this is on the site as an example

$49 (JetSaver Light fare) + $4 divided by 2= $26.50. So each passenger will fly for $26.50 (Sale JetSaver Light fare)

So mine fare should Be $46.50 x 2 + $8rtn for second Pax + 4 x $3 Surcharge = $113 and not $186!

Its Jetstar's fault that they wanted so many people to join their Email Notification

And Greg its $99 full fare for MEL-OOL, so times that by two, take of 20 for JQLIGHT, and aff 4dollars. So its really $46.50 per person per sector. The Jetstar sale page is the prices that its for each person per sector, with Jetstar already done all the calculations for us. Very confusing for some, they should have just done a 400,000 seat sale from $4 or something

Dunno if TT are going to respond, DJ has