Congrats!! I encourage you to join the LEGO Speedrunning Discord discord.gg/0nCWhvIFSY6HrFaL ,because it is easier to communicate. P.D.: when you create a unit (hero, builder, normal or special), if you have the building selected and press anywhere, then the unit will move to that spot (that may help). Also, if you have a completed file, you can still do runs there (as an example watch the Earth Story run).
Oh yeah I knew about how you can set the building to put units in certain places but didn't think it would be too useful for the levels that I was doing, It'll come in handy on other levels at some point though, for sure. And true, I realized that, so now I'm working to get a 100% file on emulator, which will take a while, but it's worth it because I can then do runs of anything I want whenever I want once everything is unlocked. And thanks, I'll join the Discord server.