Difficulties in recommendations

Hey guys hope u can help me out here.I just moved from africa to us in my senior year and have had some problems. First i will have had 2 counselors by the time i graduate. i had recommendationwritten by my african counselor just in case. i didnot see them. But we had good relationships so they will be great. But when i left my old highschool; he too left the school without telling me. Can he still send my recommendations even though he changed schools?
2. Same with my teachers. i had them write recommednations. can they send it eventhough i changed schools.

In common app

Your teachers from your old school can write letters of recommendation for you.

How about my old counselor. The new one won’t know me too well