I protested one of those because it was a restaurant shop that required a bar visit. We did the bar, but it was empty and after serving us the bartender left the bar area. After a few minutes, we left as well. They claimed the requirement was a 10 minute bar visit and we were short by a couple of minutes.
I protested to my scheduler and got no response after several emails over a week or so. I tried to kick it upstairs and got no response. Eventually I emailed a friend's responsive scheduler asking for help. With each email I included a pdf of both the shop instructions and the scheduler's specific instructions asking where there was a time limit specified for the bar. I eventually took it back to the editor. The shop was approved and in about the same round of emails I got an acknowledgement from the second scheduler whom I had asked for help and from my scheduler saying "You should have called me!" (which was funny since no phone number had been given so one had to assume that communication by email was what was desired). I got paid but with communication that bad, life is too short to work with them.