I also dive with Scubaworks quite a bit and have always been well treated and felt welcome at the shop. I would note that the diving in Jupiter, at one of the most popular spots, can be 130-140'. This is at the absolute limit for recreational diving, and requires careful nitrox mixing (I get 28%, because even 32% would be too risky on this dive). Scubaworks will work hard to give you whatever mix you want. At the depths the Emerald dives (they almost always hit the 130' ledges), any error in the mix can be quite dangerous. This is not typical recreational nitrox diving, but diving that requires precise and special mixes, and care that the right mix is used.
Thus, I am not surprised the shop would ask to see the card even for someone bringing their own previously filled tanks, If I were at the shop and discovered you had 32% I would certainly warn you and offer to adjust your mix. Fpr this diving in particular, a shop would be justified in having you analyze the tanks you bring. It also might be a requirement of their insurance given the dive profiles in the area. I do agree they should have told you, but I carry my cards whenever I dive (in fact they stay in my wallet) and maybe they just assumed you would have it.
I know from your posts you are well trained and highly competent, but a shop meeting you for the first time can't necessarily take anything for granted. Anyway, they ultimate worked with you once you showed proof of advanced training and capability, so they were certainly flexible enough to accommodate you.
The issue with the cards is becoming more common. Just recently, I had two shops (who did not know me) say they would not take me on any dives deeper than 60 feet without an AOW card, even though I had, with me, log books of my last 200 dives including dives on the deep ledges, night dives, strong current, drift dives, shore dives, wreck dives (no penetration) etc., and I am OW since 1974 with going on 1000 dives.
So, am I thrilled to have to spend $400 for the "Advanced" card that you can get with a grand total of 8 dives in your life? No. But, as I travel, it seems to be becoming the price of admission for shops that do not know me.