Changing pharmacies?

I started with Mochi about 2 weeks ago. My first vial was tirz w/ niacinimide from Empower. When I go to order a refill it’s only giving me the option of tirz w/ glycine. Does this mean I’ll be switching pharmacies? Also if I waited a few more days is it possible maybe it’ll change back to the niacinamide one?? If not, which one do you prefer?

Thanks in advance for any advice :)