Your price will not increase unless you cancel and rebook, or make a change to your current reservation. For instance if there is a ticket price increase and after that you modify your reservation, you'd be subject to the current
ticket prices.
Yes I have never heard of that, had it happen to myself or any clients!
Package pricing for 2020 will most likely be released sometime in mid to late June 2019. Don't hold me to that, however historically that's when rates are released for the next year. If you have a RO booked and want to make it a package when rates are released you'll have to cancel and rebook as RO and packages are two different departments