Hello.
I certainly understand your concerns.
1)You should be open with your orthodontist about your DESIRED RESULTS.
As they have been treating you for the past few months then can explain you clearly the challenges they are facing and current situation.
Based on your expectations your orthodontist will try there best to meet your expectations.
2)Shortened tooth could be beacuse of gum enlargement as during orthodontic treatment, if the oral hygiene is compromised, then it makes the tooth look shorter,and it can be reversed if this is the reason.
Pic will be required for better suggestion.
Next Steps
Kindly attach pre treatment pic and current pic
Health Tips
SPEAK TO YOUR ORTHODONTIST