As for re-Tailoring. In general it's best to produce a morph in a clothing item that matches each morph you use in your figures, that way you set the clothing morph to the same value as the figure (in Poser, using the dials in the usual way) and it will work in any character that uses the morph, you will only need to go back into Tailor when you use a morph on a figure for which you haven't yet created a matching morph in your dress. The other way to Tailor is to create one morph in the clothing item that combines the effects of all the morphs used to create a particular character, which is easier to manage but has to be done fresh for each character. In any case, posing the figure doesn't require new morphs beyong any tweaking you have to do to get rid of poke-through.