can a student apply ED to Colorado college and EA to another?

You need to read the ED statement and see what restrictions there are. I would guess that yes, you can. Most colleges state you have to rescind all applications IF AND WHEN ACCEPTED ED. It’s a common strategy to apply ED and to a few EAs as well.

You also have to look at the rules at the EA schools. Most will allow an ED app, but some, like Georgetown, don’t.

Don’t overlook schools with rolling admissions, as it can be nice psychologically speaking to have an early acceptance.

Umass amhurst EA

Until now, I am not notified by my ED1 dicision. is there a problem or it normally happens every year