He also admitted he failed to attend the final determination hearing before the professional conduct committee on December 7, 2010, despite being required to do so.
The tribunal found that despite the breaches there was no evidence of funds being lost or misappropriated.
The tribunal also acknowledged Mr Stevenson's difficulties in his dealing with his client and co-trustee, who was hard to communicate with, refused to provide a contact address and insisted on contact only by text message and fax.
The tribunal permanently suppressed the complainant's identity but the woman at the centre of the dispute contacted the Bay of Plenty Times and said she felt her complaint had been a "waste of time" .
Mr Stevenson's lawyer Paul Mabey QC said his client pleaded guilty to a "technical breach" of the trust account rules by moving funds to his personal bank for short periods only to help his client out.
Funds were otherwise held in a trust account, he said.
"The disciplinary tribunal's decision makes it quite clear that there is absolutely no evidence of dishonesty by my client nor any misappropriation of funds. Every dollar has been accounted for."