If you haven't experienced this before to any extent, and consensus seems to be that you are not doing anything that different to other Sprint users on the track, it could well simply be an issue with the specific tyre.
During the last decade or so of racing at 79 meetings (and counting) I've had a couple of Toyos delaminate and most recently a front Dunlop 03G showed a remarkable pattern of wear in the middle of the tread, something exactly the opposite to what I have seen before and would expect. The compounds used in race tyres have certainly got softer over time. I normally get a season out of a set, but after 6 meetings last year they were looking more like slicks and had to come off.
This is a pic from 2005 when I was running Toyos - different sizes to yours (195.60x14) and of course a stiffer suspension set up with less body roll, but the tyres do seem to be rolling over less at about 28psi front and 24 rear.
As far as i know tyres are still made individually, and I suspect you have just got a bad one or two. Maybe try something else next! A check alignment of toe, caster and camber might not go amiss first - cheaper than ruining another tyre.
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