verbal warnings...has anyone had this???? - need explaining

So I am curious if anyone else has experienced this or can explain this to me b/c I am not getting any answers...regarding verbal warnings. I recieved one not too long ago. Rightfully so. Had not met a certain criteria for months. It came in the form of a phone call with no mention of a PAP and the word was not ever used. I received a form to sign and signed it. It said I had to immediately show significant improvement or rectify it completely. My TSM said she'd call me in 2 weeks and by then I had to have this fixed. She called me a little over 2 weeks later. Said she only had 1 week of info since they are a week behind. Seven days after the phone call with the verbal warning I improved quite a bit and almost hit the mark. Fourteen days after the warning I had met it and went a bit above. I was told since they are a week behind she could not see the 2nd week where I met what they were asking and since I did not meet it they would be going ahead with the PAP, which was never mentioned on the verbal warning phone call or in what I signed. I kept asking and asking how this is possible since 14 days after the call I exceeded what they had asked for. I didn't get answers. Then finally was told they count the week prior to the call. The week I was obviously below, which is what prompted the call in the first place. I was finally told they count that as 1 week then the week later so that is the 2. I ask how this is fair or accurate and I do not get answers. I am going to take my calls further b/c I am not understanding and wondering if they do this with everyone? I was never told on the verbal warning call that I already had 1 week prior count against me. After hearing this it seems I only had 1 real week to get it up to par. I have not yet signed my PAP and am not comfortable doing so. It looks as if I have not done what they asked. I do not understand what a verbal is for then? The 3rd week after the call, which just ended a few days ago, I was even higher in what they asked and met ALL 3 criterias and was high on the grid for once. I was told it had to be consistent. Isn't that consistent? What are you given 2 weeks for if you truly are only given 1 and if that is not long enough to be consistent in their eyes?? I looked in the handbook and there is no specific explanation. How can you count a week prior to the phone call as part of their "improvement" weeks????? Am I missing something?!
Thanks.