IMO you can't break a group by simply exerting a TZ over an element on the end of the group. You can exert the TZ but you cannot force them to line up. Where there is no contact there is no compulsion to line up given that there is no illegal contact - you can exert a TZ and elect to not line up. If either party wishes to make contact and the elements are not correctly lined up then the rules kick in as per normal. That is the way we have always played this. Consider for example figure 6b on page 52, when the Bd moved up to the Wb in the previous bound, the Wb was not required to line up because there was no contact. You can also move through other elements TZ's (page 32), which implies that someone didn't conform in the previous bound. Consider also figure 6a (the Kn in the Sp TZ), figure 9c, 9e, 10b and so on - there are plenty of diagrams to support this.
IMO, and to change the subject slightly, in a situation involving front corner to front corner contact you cannot use the 'up to 80 paces' of free slide because the elements are lined up.
Andrew