1. Not so much, some focus on competition (Tomiki), while others focus more on waza, less on ki, and vice versa. Basically an organization, in my experience, forms when an instructor has an idea or interpretation of Aikido that no one else seems to have, and wants to share it with others in his/her own unique way.
That's my guess, anyways
2. Even the greatest and sharpest katana will bend and break if used poorly and with bad instruction. The same holds true for bokken and jo.