Yet another balk question

[tankmjg24]

Sorry for the numbering guys. I choose the firing squad over being stoned please

In regards to my partners explanation on how he called the balk, he stated that he looked at where the foot landed and that in his judgement it landed behind the rubber. Now I had a similar play that I posted on here that involved a right handed pitcher going to third, however his free foot in my judgement crossed behind the rubber before picking to 3rd. In the most recent case where my partner called the balk, he said that his foot did not cross behind before the pick off, but in his judgement that it landed behind the rubber after the pickoff.

Hope all that makes since.