The reason for most of the FP weight changes in the February Fastrack is that a blanket 100 lb decrease was given to former GP cars that had been moved to FP (when GP disappeared), but some cars (that had already been in FP) were incorrectly given the 100 lb decrease. The February Fastrack corrects those errors. The CRX Si was one of those that was corrected; the Civic Si was not one of those incorrectly given the weight break.
Dave