You have been given conflicting opinions because the question has nothing to do with Ohio law.
Stepparent adoption in Ohio falls under the purview of the Probate court and the following two statutes prevail:
§ 3107.03. Who may adopt.
The following persons may adopt:
(A) A husband and wife together, at least one of whom is an adult;
(B) An unmarried adult;
(C) The unmarried minor parent of the person to be adopted;
(D) A married adult without the other spouse joining as a petitioner if any of the following apply:
(1) The other spouse is a parent of the person to be adopted and supports the adoption;
(2) The petitioner and the other spouse are separated under section 3103.06 or 3105.17 of the Revised Code;
(3) The failure of the other spouse to join in the petition or to support the adoption is found by the court to be by reason of prolonged unexplained absence, unavailability, incapacity, or circumstances that make it impossible or unreasonably difficult to obtain either the support or refusal of the other spouse.
[§ 3107.05.1] § 3107.051. Time for filing petition.
(A) Except as provided in division (B) of this section, a person seeking to adopt a minor, or the agency or attorney arranging the adoption, shall submit a petition for the minor's adoption no later than ninety days after the date the minor is placed in the person's home. Failure to file a petition within the time provided by this division does not affect a court's jurisdiction to hear the petition and is not grounds for denying the petition.
(B) This section does not apply if any of the following apply:
(1) The person seeking to adopt the minor is the minor's stepparent;
(2) The minor was not originally placed in the person's home with the purpose of the person adopting the minor;
(3) The minor is a "child with special needs," as defined by the director of job and family services in accordance with section 5153.163 [5153.16.3] of the Revised Code.
The ONLY mention of a timeframe is in the immediately preceeding statutes which gives a time for filing of the petition for adoption.
There is no mention of the length of a marriage or even that a marriage is required for adoption and, pursuant to
§ 3107.06 Of the ORS, the bio-father is not, under certain circumstances, even required to be allowed an objection.
THIS is probably what you were being advised of, that support and/or contact must not have occurred in any way for 1 year prior to the filing of the petition.