My Walgreens Scenario for 10/24

I plan on hitting up Walgreens tomorrow during lunch. There is a new $5/20 coupon which you can find here: Coupons.com

You will need to spend $20 after coupons to be eligible to use this coupon. There are also reports that you can only print 2 of these coupons from every 1 computer you use. They are good for 10/24 and 10/25 - which just happens to be at the EXACT SAME TIME as Walgreen's Double Dipping Days. I need to stop at Walgreens in the morning to get a November Easy Saver catalog to work on my deals for Double Dipping but here is my scenario for using one of the $5/20 coupons:

Lysol Freshmatic - $5.99 each
Use $5/1 coupon
(**November Easy Saver Rebate $3/1)
Total Price: $0.99 (get $3.00 back on Wags Giftcard)

Alka Seltzer Cold - $4.99 each
Use $1/1 printable
Receive $4.99 back in Register Rewards
Total Price: FREE!

2 x Sudafed PE - $3.99 each (buy 3 or more get $5.00 in Register Rewards)
Use $1.50/1 coupon
Use $1.00/1 coupon or $1.00/1 printable
Total Price: $5.48 for 2

Children's Benadryl - $6.49 each
Use $1.00/1 coupon
Total Price: $5.99

Kellog's Ceral 2/$5.00
Use various $1/1 printables (which looks like they are no longer available)
Total Price: $3.00 for 2

Gallon of Milk - $2.49

My Total will come to $21.44 + $1.55 tax (approx.) = $22.99
$22.99 - $5.00 Walgreens Coupon = $17.99

I will receive $9.99 in Register Rewards and $3.00 in Easy Saver Rebates

Which means my total out of pocket is $5.00!

NOW HOPEFULLY THIS WILL REALLY WORK! It has been my experience that I go to the store with a plan and there is always something on sale I am looking for that they are out of! Anyone else have this experience?