college transcripts

In the application process, is there any place you can put college transcript separate from highschool? Since in my freshman and sophomore year, I did dual enrollment so I have some college credit, however they haven't been added to my high school transcript. Or would I need to merge the...

I’m wondering if we can send official and sealed college transcripts together but in their respective envelopes in a priority envelope, or must they come directly from the universities using either snail mail or electronically? Thanks!