the problem is in the period between 1877 and 1890 approx - the films from which the extracted records were derived were not of the original parish records but of the 1911 official transcription(generally very good thou sometimes misinterpreted by IGI) which went up to approx the period of civil regs were available (diff years for bapts + marriages + burials);
the later films are of the actual parish regs with the transcriptions provided by volunteer labour in the museum then collated by the mormons - these 'films' are the basis of the digital images to be used in the new iCentre opening early next year.