I read the last 4 contracts and this language is essentially the same....but that's not how it went then, so again why now?
....and what about the guy who qualifies a couple of days after 8/01/2018, why was he left behind for his entire 4 year progression???
You are hitting on most of the issues I have with this situation. The main difference in the language this time around is there is no date for the annual increases. In my estimation that means as long as anyone in progression gets an increase at least as large as the gwi and no less than the progression increase any time in a contract year, the contract terms have been satisfied.
The reason the language about full timers who have reached seniority prior to August 1st is in there is so they will be bumped up to the rate they should make in the new progression schedule as of August 1st. Without that language they would stay in the old progression schedule and technically have to wait until their next progression bump to be dovetailed in to the new progression schedule. Full timers attaining seniority after August 1st will already be in the new progression schedule, so they don't need language to bring them into it.
It is pretty confusing, but even a crappy lawyer should be able to piece it together. So the fact that people have gotten the gwi increase separate from their progression bump tells me someone in management or payroll jumped the gun before legal could look it over. There may be some regional variations, but language in the master should nullify those anyway.