10% discount for new lines

Hello,

I switched over from Rogers to Fido in November during the $40 4GB plans.  When I signed up, I was told by the rep that any additional lines I add to my account would get a 10% discount, so I added 2 additional lines to my account.

However only one line got the disount, the other line does not show any discount at all.

Main - $40

2nd - $36 (10% off)

3rd - $40

When will the discount be applied for my 3rd line?

Thanks

***Edited to add labels***