Shop Day Sunday - CVS

ALMOST rocked this one but something weird and annoying happened with the register. Hoping to find out more.

CVS is still out of the Warm Delights and Windex stuff I have a rain check for from last week... and I forgot/couldn't find my large stash of B1G1 Sobe coupons so here's what I got.

Transaction 1:
Cereal 3 for $10 (get $5 ECB)
BioTrue Contact Solution $2.99 (get $2.99 ECB)
Sobe B1G1
Sobe B1G1 (husband drank one in the car...)
=16.17

Less
$1 off any 2 Post Cereals
$2 off Grape Nuts (Post)
Sobe B1G1
Sobe B1G1
Last week's $10 ECB reduced to 9.99
=0 (So, spent $10 ECB, got $7.99ECB)

Transaction 2:
CG Mascara (50% off original) now 3.85
CG Mascara (50% off original) now 3.99
CG Mascara (50% off original) now 3.99
CG Eyeshadow 3.39
CG Eyeshadow 3.39
CG Eyeshadow 3.39
Caliber Envelope B1G1 2.99
Caliber Envelope FREE
=24.99

Less
$1 off any CG
$1 off any CG
$1 off any CG
B1 CG Mascara, get eye kit free x 3 (cashier made mascaras free instead of eyeshadow).
Less $7.99 ECBs from 1st transaction
=2.03 cash

I had thought I would be receiving the $5 ECB for purchasing $15 worth of Covergirl products but it did not work. Now I have to find out if I can rectify this in a separate trip since it seemed to be keeping track on my extracare card. (It says I am 4.83 short.) So as it stands today, this trip cost me only 2 in cash but "effectively" I paid $12.03 for these products. I'm still hoping that I can go in and spent $4.83 and get $5 back next time I go...