<font face="Verdana, Arial" size="2"> The Yang Style Taijiquan book pictures this explicitly and includes it in the instructions for the movement.</font>
I am not sure if we are referring to the same book, but mine has: “Place left palm on the inside of right forearm near the waist, looking as if it is going to press forward.” I interpret this as meaning that the left palm may brush the inside of the right arm, but there is no need to squeeze the two together and possibly impede the transition into White Crane.
As for the divisions in the movement, I can speculate that as Yang Chengfu revised details in his form and de-emphasized the Shoulder Strike, there may have been some question as to how to divide up the remaining transitional movements. I am not sure I understand all the footnotes in my Yang Style Taijiquan book, but there is no difference in the movement details. The only question is about which transitional movements go with which endpoint.
As we do the form now, the Press energy comes as an interlude in the middle of preparations for White Crane. After Lifting Hands, our attention goes left to initiate the circling (perhaps in response to an imagined push coming from the east (e.g., left), but then we change our attention back to the south (e.g., the original form direction) for the Press and Shoulder Strike energy. Then we shift the attention back to south to conclude White Crane.
I hope this helps.
[This message has been edited by Audi (edited 09-21-2008).]