Well, the most recent event was this: I just got this job at a corporate, very busy, high turnover restaurant. I realized this environment isn't to my liking and put my notice in after working there about a week. I just know whether something's a fit or not and this place wasn't for me. But I put notice in and was going to fulfill my responsibility to the restaurant.
On a busy Friday night, I forgot to put in a table's order. My boss came up to me and chewed me out. Okay, fair enough. But after telling me this my boss pulls me aside again a few minutes later and lays into me about how I'm not paying attention and my focus is elsewhere and basically telling me that I'm not doing a good job, etc. She then tells me since I put my notice in that this could be my last night and don't worry about coming in.
Keep in mind...this was only my third shift at this restaurant and I made two minor mistakes earlier in the night. However, these first two mistakes didn't affect service like the last mistake about not putting the order in.
My reaction to her was utter bewilderment! Like, "Okay. I've already apologized. Why is this person coming at me like this? Why is she taking this so personally?" I really wasn't angry. More hurt that she would question my efforts of trying to do a good job. I just wanted to escape the situation.
I thought that was the end of it but at the end of the night when I was handing in my checkout my boss brought up the situation again. This is when I got angry. I told her that "bringing it up again was pointless because she herself told me that this was my last night. So who cares about further discussion of my error?! Also, I had already apologized to her and my table. So what more could I do. Also, it was my third shift and no one is perfect. After all, this is not an uncommon error and that she was taking it way too seriously." I felt like she wanted to get a rise out of me and wasn't going to be satisfied she got a reaction from me. (I have sort of a flat affect). Luckily she didn't see my anger but I had to vent to my friend afterward.
I guess her ego didn't like the fact that she brought up the situation three times in an attempt to get an emotional response out of you, but you remained calm and rational. I would have handled myself the same way because that's the only reasonable thing to do, but perhaps she perceived this attitude as you not caring. But then some egos feed off negativity.
There's no reason for you to be angry. The past has passed. You rectified the situation as best you could, and apologized. It's no longer a problem. If she chooses to hold onto it, then it becomes solely her problem.