From OP’s subject line (improper lane use, not improper turning movement), it sounds like he was maybe cited for:
§79. Driving on roadway laned for traffic
Whenever any roadway has been divided into two or more clearly marked lanes for traffic, the following rules, in addition to all others consistent herewith, shall apply.
(1) A vehicle shall be driven as nearly as practicable entirely within a single lane and shall not be moved from such lane until the driver has first ascertained that such movement can be made with safety.
(2) The department may erect signs directing slow moving traffic to use a designated lane or designating those lanes to be used by traffic moving in a particular direction, and drivers of vehicles shall obey the directions of such signs.
If that is the case, then the listed charge is not as specifically relevant to the described circumstances as is section 101. So, OP may have an argument that his actions were not in violation of the statute charged.
However, even though 101 appears to be a more appropriate charge for OP’s actions, 79 may well still be valid as he moved from the “not marked for any specific purpose” through lane to make the turn. Since other drivers cannot be relied on to obey the right turn only designation, OP did not move from the lane without first ascertaining that the movement could be made safely.