Last year I lumped them together.
Then you must continue to do so. That's the only way the 2019 program can correctly import your depreciation and carry over losses from the 2018 tax file. For you to separate them out requires a "LOT" of paperwork with the IRS, and that's something TurboTax can not handle.
Once you group properties together, you're required to continue doing so. You can't switch between the two methods as you please.