My guess would be you spun the needle and "messed" it up a bit. I'm not sure of the "proper" shift points, so I can't help you out there. If you know where it should be shifting, you can play with the needle until you have it where you want it. I did that with mine when I installed my first white-faced BNM gauges back in 2001. It took a 1/2 hour or so, but I got it near perfect.

02 Nissan Altima 3.5 SE, FULLY LOADED Old car- 99 SE Sport ATX w/ SVT body kit (for sale...asking $4,200 OBO), nicely modded, high-flow exhaust y-pipe back and KKM. 95K, but 95% are interstate highway miles back and forth to college everyday.