From the Trisquel "Donate" page:
If you want your donation to be publicly shown in our site, remember to press
the "go back to Trisquel GNU/Linux" link at the end of the PayPal payment
process. If you make a deposit in our account you can contact with us and we
will manually add your donation to the list.
Have you tried sending an email? I would expect that it works analogous to
the one-time donations - I imagine it's hard to automatically have bank
transfers trigger the membership status (for lack of a better world).
