CO ... here is an example of Manny's grip at 'launch'. The alignment of the 'knocking knuckles' resembles more what some refer to as a 'box grip'.
Here we see the 'knocking knuckle' alignment at 'contact'. Looks more to me like the "knocking knuckles" of the top hand are roughly aligned to the wedding ring area of the bottom hand ... perhaps could even view this as having the knocking knuckles aligned at contact. Different alignment of the knocking knuckles as seen in his launch position IMO.
Just so we are clear, are you saying that Manny has an "off-set" grip at launch and aligned "knocking knuckles" at POC? If so, he must be turning his top hand to achieve the alignment?