Thanks for the suggestion. This is definitely something we can look in to. It's not the most complex task every but would take a significant effort to implement in all of the areas that Canned Responses touches. In the meantime, a hack to get around it would be to start the name of each canned response with a number. For example...
05 This is response 1
10 This is response 2
20 This is response 3
30 This is response 4
So when TubeBuddy sorts them alphabetically, they will be sorted by the 2 numbers that start each name. And I'd leave gaps/spaces that could be filled in later (instead of 1,2,3,4 do 10, 20, 30, 40) and there is room to insert new ones between them. No ideal, but better than nothing for now.