I've broken the "code"!!

I think I have finally gotten the hang of the Walgreen's register rewards system! Last night I was thinking-and it HIT me! You've already read how I got the Skippy and Ragu deal-and earned a $10 Register reward....I was wondering if it would work to use that $10 on ANOTHER/ DIFFERENT deal! My question was...will it still print out the reward if you pay with a reward...and YES, it does! I asked the manager and he told me that he was not certain, but said we could try and if it did not work, then he would void the transaction, but it did! So, if you earned $10 on one deal-you can use it to earn MORE rewards on other deals-just not the same deal! So, you could just keep rolling them back and forth if you wanted to! I got the Aleve-D deal (Brooke has a cold)-if you spend $20, you get $10 in register rewards-with my coupons my total was $16-minus the $10 earned for the skippy/ragu deal - I paid $6.00 cash and got back $10 in RR! I used it to buy a whole MESS of stuff that was on clearance (ex-Visine tears $2.19 minus my $2.00 coupon=.19! Loeral foundation $3.19 minus $3.00 coupon= .19) My total out of pocket expense was $2.71 (subtotal was only .75!) and I SAVED $141.78!!
On that order I got:
2 of the chocolate covered macadamias
3 Visines
3 nail polishes
3 Loreal concealers
2 Loreal foundations
3 Tylenol arthritis
1 Bio shampoo
1 Bio conditioner
2 Welches grape jelly (squeeze bottles)
1 (3 pack) of dial soap
and a tube of chap stick.....for $2.71!