Thanks for the answer bruce, but I have a question in regards to your post, which is: Did your training loads for both the low and high rep phases increase?
1. Beware - I haven't posted a pic yet.
2. Exercise form must be smooth - this can't go on forever because of physical limitations, but making a weight(e.g. last/peak set of squats) only by nearly shitting yourself does not really count. This greatly reduces the possibility of unlimited linear progress in the form of pyramiding up. Your skeletal structure is in many cases a deciding factor on how well you can load your muscles.
Spy on titty people(petite structure) in gym trying to use big weights(e.g. bench in the 240+ range) - a tragedy of movement. Compare to someone like Cutler, a large framed dude who has the goods to be big and strong.
3. Yes - always increase, but always mini-mini, controlled fashion(like in a 5x5 derivative) + log book.
One of the biggest mistakes I made for years on end was using a fantasy weight, adding like 40 pound a workout and stopping after 3 workouts to reset to the old weight... practically making no progress.
Once you bomb out of a training cycle(due to no time, injury or stupidity) you have to restart.
After a while and many failed attempts or misses you realize that you can realistically progress as much as you're willing to put work in and your genes allow you - BUT time waits for no one and better be doing the right thing while your body is still capable of it... the sky isn't the limit
for one can "only" improve on what one initially has always been.