devtrackers.gg
If they are alphabetical it's missing a bunch since it shows GMP first. Strange.
We decided against alphabetical since it could only work for English and result in a meaningless order for any other language, and because that would be harder to manage when we added new supports in future and had to rearrange the list. So instead we chose the order of their being added to the game (and I went on a fun dive into the far past to determine which was the first support effect added). This way future supports can be added to the end of the table without disrupting any existing ones, and it's a neat trivia thing that GMP (then "Multiple Shots") was the first support in PoE.
Wouldn't the tooltip make more sense with saying (Random Support) or something like that? There is no clear sequence from GMP to Urgent Orders.
This is not arbitrary text that's entered specifically for the item. The advanced mod descriptions just look at what the minimum and maximum rolls would say and use that as the text.
Would it be safe to assume that since these are two identical mod ranges as separate affixes, it can roll the same support twice? And then only link one of them with the socketed skills, of course.
Yes.