AITAH: 711 worker stealing reward points

(41m) have been patronizing the 711 near me since I was a child. Never had an issue there until recently, when I went to click 'Save $1.00' while checking out. The woman moved my hand and said "no that is my number" and muttered "oh, thats right you usually use your points". This was a $50+ purchase, but I just brushed it off initially. After thinking about it, I became annoyed that she felt entitled to my rewards, and was essentially stealing from me. Then I considered her bad attitude, which I typically brush off, because I also work customer service. I would never treat customers in a rude manner though, so why should I accept it for myself?

Well yesterday, another $50+ purchase, and the mfer does it again! She then has the nerve to say "you don't like the self checkout do you?", insisting I should use that instead of her doing her job. I was pissed and said "I guess I should use it, I wouldn't have to worry about anyone stealing my reward points!" and walked out

Today, I reported her to corporate. I shouldn't have to worry about being ripped off at a store I have been patronizing for over a decade. While I can empathize with her financial situation, I am also poor, but would NEVER take advantage of my customers (I wait tables in the evening). Corporate will take action, and reimburse rewards, so she will likely be fired. I feel bad for that, but also, why should I respect someone who is stealing from me, and also rude? AITAH?