OK true. Can you blame kickbacks for the 7 standing with the 9? Possibly. Fact is I've done it twice at Richlands, both times on the very same lane, Lane number 5. Sure it may just be bad luck and coincidence that it's happened the two times I have bowled on that pair, specifically on that lane. Maybe the rack is offset, although it didn't look to be either time. I've bowled in a lot of centres, on a lot of conditions, on wood, anvilane and guardian overlay, brunswicks, HPLs, and fixed, washed and cleaned a few kickbacks too, and I can't say I can recall leaving it anywhere else as a right hander.
Maybe Luke or Hamish can inform me.. I don't think it was a bad shot, nor do I think it was any higher or stronger in the pocket than the previous ball which was a strike. But, as you say, the 9 pin stood so it must have been a stronger entry angle. Please tell me why the 7 would stand with it?