I'm not currently playing RIFT so can't confirm for you that these macros still work. Maybe someone who is still playing can do that.
However, the behaviour you describe (When I click the the keys assigned I target myself for follow instead of the other character being selected to follow me.) is not unexpected. You would need to Shift+Click to follow character1 and Alt+Click to follow character2 (again my best guess from memory - I have no way currently of confirming this works). I'm not exactly sure what the expected behaviour of the key alone is but I suspect it may default to follow on self (as a default target). If you are hung up on that behaviour and haven't done everything else I'd encourage you to do so.
If the problem persists, I would need you to copy here/type here the two macros you are using (the actual macros, not my version) and also see your ISBoxer configuration (
instructions). Meanwhile, you could double-check the macros for typos and that all the in-game keybinds you expect to be set are still set correctly.