entering paid expenses for year

So, I thought this would be intuitive but it's not - at all.  We just got Quickbooks and are entering all of our 2018 business expenses.  Originally thought we would list each month by vendor but it appears we piece meal everything per transaction - vendor, account paid from, method of payment, date and amount.  Fine.  Did that and over and over and over again half of what I am entering does not save even though I am saving it.  Either there are serious bugs or it is there but just doesn't display where it's supposed to.  I've done this and go back to my dash, and master list of expenses - some months show and some months don't.  Please don't tell me I must not be saving some because I've done this four times in a row now, deleting everything and starting over entering each piece for every transaction and saving each one.  I've already spent more time on this first task than what I used to spend doing it all manually.  During tax season, QB should have live support 7 days a week (IMHO)!