Get your minds out of the gutter!

Explain this please.  Last night when we started I was playing the left lane to hook about 6 more boards than the right lane.  Nothing too unusual in that.  Ended up using two balls to compensate so I could stand and look at the same spots on each lane (I'm getting old and have enough trouble remembering where I set on one lane, let alone two).  Over the course of the evening the left side (hooking lane) never changed, but the right side made a sudden transition at the start of game two and gradually proceeded to come to the same shot as the left side - maybe hooked a board more.  Ended up using the same ball on both lanes by the end of game 2.  What I dont' get is why no change on the left lane?
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"To plunder, to slaughter, to steal, these things they misname empire; and where they make a wilderness, they call it peace."  (Tacitus)
"If one tells the truth, one is sure sooner or later to be found out. " (Wilde)

Pinbuster, two big handed "kids" were playing deep, the house pro and I were playing 11 at the arrows out to 8, the other six were throwing the ball in the general direction of the pins.  Nobody was really outside of where Rich and I were and we both were having out troubles;  I could smash the non-hooking lane but had to be careful of going high on the other and Rich was the opposite - he was killing the hooking side but having some trouble on the left side.

I think your second idea is what was happening, but there could have been some "lane memory" involved as well.  We bowled on a very tough pattern on the same lanes two days before, with not much play on them in the interval, though they had been stripped and reoiled.
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"To plunder, to slaughter, to steal, these things they misname empire; and where they make a wilderness, they call it peace."  (Tacitus)
"If one tells the truth, one is sure sooner or later to be found out. " (Wilde)