BY MEGAN SCHRADER megan.schrader@gazette.com -A twice-convicted sex offender from El Paso County caused a stir at the Colorado Republicans annual organization meeting by attending the event at Douglas County High School in support of the party's new vice-chairman Derrick Wilburn.Ryan Call, who presided over the assembly as chair of the Colorado GOP, said he requested the sergeant of arms ask the individual to leave."I did not think it was appropriate to have him there, certainly on school grounds, or involved in connection with our meeting," Call said.Dwight David Dorty, a registered sex offender in Woodland Park, was seen by several people at Wilburn's booth and his presence on school property raised alarm with many.