It will get better, seems that times got worse as the night went by because of the 60 foots, but that is the way it is.
The clutch could slip to the point where you don't feel it, but it is slipping costing you a little amount of HP, but nothing to lose sleep over, now when you get it hot and you feel it slipping then you are hurting.
Good luck, I wanna line up next to you so bad next track day, I hope you got a little more than that when we run cause with next track day being 3 months from now and all, Cavy might get quicker.