As stated right there on the label, some of the NaCl has been replaced with taster’s choice KCl. So it was never pure sodium to begin with, due to all that pesky chlorine and now about half of the Na has been replaced with Potassium.
I had to read this like 24 times to make sure I didn’t miss anything, but I’m 98% certain you’re correct. When referring to the individual components it should be chlorine not chloride. I’m not a chemical doctor, but this is my understanding.
Imagine making pasta and salting the water with pure sodium. There’s a reason they don’t sell that in the supermarket.