You gave evil damsels to a "friend"
They grow up and bite your hand drawing blood....did you warn your friend? All kidding aside. After reading your post on putting 8 fish in a 50g then wanting to add another 3....and now seeing the crazy overstock and type of fish you chose for a 10g tank. I think what you need to help you is a really good book on fish.
This book is hands down the best I found to help pick out what fish should go in what size tank, and I am posting a page so you can see the good info it offers. PLEASE buy this book and no fish until afterwards.

