Sometimes it can be difficult finding things - the forms can have all sorts of numbers pre-printed, stamped, and written at the top. I think where you are getting hung up on the 6-digit/5-digit thing can be explained though...for example, the codes for little Norman were B13122 1923-09-315375. The 315375 is what you call the six digit code, right?Well, split it into two 3 digit codes 315 and 375 and forget about the 1923-09- part for the purposes of looking at the film.Find the cassette labelled B13122 on the rack, load it and then page forward to the first certificate.Look at the very top of the screen and you'll see a header or title for the film and the second line of this header will show a volume (vol) number. (At least, I think it says vol - I don't have one in front of me!) That three digit number is usually the first three digits of your six digit code.Now roll through until you find the Norman's three digit code - 315.Once you find the start of volume 315, start looking for the last three digits of your number (375).These will appear as the last three digits of one of the numbers that's at the top of the actual certificate.The number printed at the top of Norman's form was 91375 and you're looking for 375.One of the numbers at the top of the certificate should end with your 3 digits and you're right - sometimes the number at the top is five digits.But it can vary - on the marriage certificate, for example, (B11388 1918-09-188520) both 1918-09-188520 and 59520 are stamped at the top but it's the 520 that's the key.
Failing that, the lists within each volume number are often in semi-alphabetical order!