Im not gonna rag you and tell you how wrong things played out, i think you realize that already...

but i have a few observations...

were you using a gun or a bow? i couldnt tell (im gonna assume you had a gun, cause i've never heard of a bow breakin a spine). Either way, If you had just waited on the first doe you woulda been fine. Why take the bad shot and risk loosing her? You shouldn't have expected the second deer to still be there after the first shot anyways, so you should make the first doe count. If after you had first deer down, and another one was still hangin round, then have at it. Oh, and take your gun with you when you're lookin for them, if you happen upon them and they are not totally dead then you can end it quickly, or if you spook them, then maybe you can take another shot.

Don't let them tell you that its bad to take does, its not, plus they taste just as yummy as the bucks do.