If there was open bowling on the pair after they oiled and before your league, they could have created carrydown with polyester or house balls. It could have taken a game to recreate a dry area that the lane machine originally created.
I assume you saw some irregular ball reaction in the first game, being an older more experienced player and it could have confused you, IF there were carrydown and there were no other decent or educated bowlers on your pair with you.
I don't know if this was the case or not. Just never assume the lanes are in pristine condition, EVEN IF you saw them oiling just before your league and especially if the house says, "but we just oiled"!
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Only assume what you see based on the ball reaction of a ball you know.
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"None are so blind as those who will not see."