Your Alkalinity concerns me being that high from your tap. Mine is only around 120-150ppm. Are you using the 25ml sample and it starts as GREEN after adding R-0007 & R-0008? Your end point is Red (like a cherry red). Just want to verify your testing and that you are using speedstirrer. May be best to test again - just to confirm. Practice is always good, regardless.
Not sure why Calcium readings are so far apart as it appears you do not have a water softener, unless you have some sort of water purifier for your inside tap. You indicated the start color was a little different but your end point (blue) was the same. Regardless, your CH will be spot on for your fill water- I keep mine in the 250 to 375 range as a norm as that where it seems to work best for my CSI, but every pool is a little different but you should be OK. Just watch overtime as you may build up CH with your fill water.
Similar with pH - you will need to add MA but with that high TA you would be adding MA regardless. So just something you will need to watch and do some adjustments. Remember that bringing down TA takes time because you do not want to drop your pH below 7 so you will need to lower pH, which also drops TA, aerate to increase pH and then do it again to lower TA. This may take several cycles.
Hope this helps