Based on those three readings, I assume your CC level is zero, CYA is around 50 to 60, TH around 50, and PH around 8.
With CYA at 50, you want FC to be a little higher, between 4 and 8.
Your PH is a little to high. Lower it by about 0.4, so it reads 7.2 on your test strips.
Your calcium is fine. Vinyl liner pools don't need calcium.
The real solution, as you already guessed, is to get a TF-100 and then trust your own test results.