Help me out please? I am new to CVSing. Just when I feel like I have it something happens and makes me feel like

.
Last night I wandered into one CVS unintentionally. (They are one of the only places that carry the Arizona diet green tea around here. YUM.)
It was late and I noticed the price tags were up showing today's sales. I asked the clerk if the prices for the sales would ring up even though it was early. She did not say anything because a manager was near by but gave me an Uh huh! eye. YAY!
I did not have my coupon organzier with me but had a few coupons in my purse so last night I ended up with:
4 of the BIC Triumph for free! (BOGO and 4 cpns)
1 Herbal Essence Shampoo (cpn and $1 ECB)
Left with OOP $1.10 and I got $1 ECB - seemed pretty good
Today with my coupons I went to another CVS that seems to be a little secret in my area because they always seem to have the best of the limited goodies.
BUT this is what I left with
3/10 Kashi Bars ($4.50 off with coupon and 5 ECB)
2 Herbal Essence (BOGO coupon)
Lunch Carrier ($3 ECB-need one- found last years with a REALLY BAD case of mold)
Tylenol (needed some- $1 coupon)
I had a $4/20 coupon
(forgot the ECB from last night at home)
after everthing was said and done the bill was $16.26 and I ended up with $8 ECB. So really $8.26 total- but it just does not seem like the best I could have done. I can't wait for the
profit transaction, where I can walk out and feel like they paid me to come.
Does anyone see a better way to have done this?