The bad news is he raised it too much and probably charged you for the "Alk Up" which is nothing more the baking soda, plain old A&H.
The good news is that with a CH of 170, a TA of 150 is probably harmless. Generally in vinyl pools, that combo of TA and CH should be no big deal. Only in the rare case when a pool owner cannot keep their pH constant and it rises on them do they have to lower it.

However.....SWCGs tend to raise pH so a low TA tends to inhibit that a bit, and you may need to work to get TA down. If, however, with your SWCG, you don't see pH rising, again, you're OK. With a bunch of tri-chlor pucks you probably won't see pH rise because the pucks are very acid. But when they are gone it might start rising.

I wouldn't test FC and CC too often at the 5 drop/ppm level or you'll burn through your powder and drops really fast. Use the 10ml water mark so each drop is .5 ppm, not .2. Save your reagents.
We cannot tell if you CYA is "fine" or what that means. For us at PF, CYA can be "fine" at 30ppm, or at 80ppm, as long as you chlorinate appropriately for that level. But since you have an SWCG, "Fine" for you means, probably, 60 to 80 ppm, depending on the manufacturer. Generally, with an SWCG, unless you are shocking your pool, an FC of 5% of the the CYA (in the 60-80ppm range) is recommended. So at CYA=60, standard FC is 3, and a CYA=80, FC is 4.