Cya 100 + ?????

[macox126]

Maybe need help, not sure. New fiberglass pool installed in May 2012. CYA tested with K-2006 is at least 100 presently. FC is 4, CC is 0, PH is 7.4, TA is 90, CH is 170, CYA is 100. Have use stabilized TRI CHLOR tabs in auto feeder since pool was new in May due to installer reco. Have not added CH tabs since 7/13/12. FC and PH have always ran high till now. No, this is not a typo. Water has been stellar and still is clear and no odor.. Light load as grandkids mostly, a few adults occasionally. Should I be concerned? Please advise as I would rather correct CYA now if necessary. Thanks