I wasn't there this past weekend, but I can remember back in 2012 when it rained so much Sunday afternoon thru Monday morning, the rubber was separating from the racing surface and once the rained stopped and it was going to be an all day process of completely scraping the track and re-applying new rubber. So the race was canceled until the next weekend.
Why one lane was so good and the other was so terrible was kind of mind boggling to me as I watched round 1 unfold.
A couple random thoughts I've had are, I was told awhile back when a concrete racing surface is poured, there is no way to insure that both concrete pads are poured the same way. After a lot a rain, maybe the right lane or the whole track has an adhesion problem.
My other thought would be, was there some type of event (oil, diesel fuel, antifreeze) that happened in the right lane at a prior race. Could a large amount rain pulled some type of prior fluid up?
Again, just some random thoughts. I'm not a track owner or track prep guru.