Hey Claire,
It is an open spreadsheet, for all to add details about themselves or to fill in things for people who require help with it. Once you first apply, once 1st stage is completed then somebody will usually lift your application so that it is in date order of when the Visa office received the file. Usually the reason for it being in Visa office received date as oppose to application date is, generally it does seem that the VO in London seems to process in order of when they received the file. (This is not definitive and some VO's do process in order of initial application).
Sorry you have been deleted twice, it sucks when somebody edits your data or even worse in your case deletes you entirely. This spreadsheet is all we have to look at where London office may or may not be in relation to 2nd stage processing, so it is important it's accurate, up to date and nobody is deleted. You are fine to add your own details, because it is an ongoing thread and never stops it is hard to have only 1 administrator for the spreadsheet.
Wishing you a speedy process and good luck