Selecting engies with mupltiple tch lvl

If i select for example: 3 T1 engies 3 T2 engies and 3 T3 engies the game only lets me place T1 stuff =´(

Is there an option to change that???
Also do subs atack while moving?

I don't think there is an option to avoid it, but what you can do is select all lower level engies, set them to assist the higher levels and then select the high tier engies and use them.

Also subs do attack while moving