1 - I don't believe there is any way to share place details among multiple places. You'll have to re-enter them for each main place variation.
2 - I consider the GEDCOM counter to be just a form of progress bar. In fact, it always ends on a "decade" count, instead of the actual count. For example, if the database has 423 individuals, the GEDCOM count will stop at 420. If you want accurate counts, go to File > Properties.