I would just like to say that using the autonumber function in order to apply a unique identification number to sightings was perhaps the most well intentioned silly thing in the world considering how many volunteers of varying technological skills are left to their own devices when it comes to putting data in. In fact someone really should've considered the fact that people can and will decide deleting records is a far better option than actually leaving a note asking if someone can hop along and correct them, which seems logical, unless you know how the autonumber function works and are quite aware that the particular version you're using does not reset itself after compacting and fixing it requires far more effort than is needed for something that just needs to be identifiable, and then people get their brain in a twist because they cannot comprehend that the sightings numbers do not need to be sequentially in order providing we can link effort lines to them, which also results in staying behind three hours after work ended in order to renumber the paper copies, leave a nice note for the next person on explaining the anonymous deletions and the number gap, and then making a nice sign reading "do not delete records" to blue tac on the computer screen, it's wonderful.