Maybe I'm a little mixed up with definitions here...  For example, If I were to submit an image of someone on street corner taking a selfie from behind the subject (their face not showing in photo) and submitted image to Alamy without model release they would categorize it as rights managed editorial, correct?  If I submitted same photo to Fotolia/Adobe, for example, they would categorize it royalty free as long as person's face is not identifiable.  And maybe other microstocks would let image be used royalty free as long as person's face is not identifiable.  Alamy would make them RM but other agencies would not.  So my question is:  Would this cause problems for me since Alamy and some microstocks categorize same image differently?  I don't think Alamy wants to tell buyers that there are certain restrictions on an image when competing agencies are saying otherwise with same image.  I would like to submit to several agencies but I don't want any problems with Alamy or any other agency.  Thanks in advance.

If anyone's interested I saw a youtube vid on Fotolia/Adobe stock  ( https://www.youtube.com/watch?v=VY4y_J5D8K0 ) and they show ( at 18:42 into video) an image of people standing around a desk without showing faces, just their hands, business meeting type of shot.  This image would be rights managed at Alamy but royalty free at Fotolia/Adobe.

RM = limits on terms of usage/area/time
RF = little to no limits, no further payments

commercial - can be used to promote things
editorial - can only be utilized for newsworthy uses

RM/RF are separate from commercial/editorial.

editorial - can only be utilized for newsworthy events.

Editorial can also be used to illustrate editorial articles, whether 'newsworthy' or not.
Also in textbooks, travel guidebooks etc.

Sure.  I didn't feel like typing an essay at 3am.

I thought that must be an outlandish time Stateside!

Thanks for all replies.  I'm still a little confused here.  I'm aware of all the definitions/explanations given here but something like "...the option to license images as RF editorial" is part of the confusion for me. 
If "RF = little to no limits, no further payments"
and "editorial - can only be utilized for illustrate editorial articles/newsworthy uses"
it seems like its just a matter of time before these overlapping grey areas cause conflicts if you're submitting to several stock agencies.  How do yous guys do it?  Again, thanks for all your help.