You may define a variable in every file:

ORDER=${ORDER}+"/etc/profile"

respectively

ORDER=${ORDER}+"~/.profile"

and perform an

echo ${ORDER}

to see, what was involved and in which order. Of course it will not tell you, if there were different scripts you missed.

So if you see one source mentioned, read that script to look, whether one script sources another one, and include these too.

/etc/bash.bashrc and ~/.bashrc and ~/.bash_login come to mind, as well as things from /etc/default.