When I have a dream it may last a long time but when I become lucid It lasts about 3 minutes after that but it just ends for no reason, not because I get shocked of anything. I have no problems staying lucid, i have never lost lucidity when I became lucid. When I do something it never goes right list when I make a door to lead somewhere it appears…coming from the roof. I make a basketball…that doesn’t bounce. I want to make a long curved sword but I end up making a tiny little dirk. When I do something there is nearly always something off about it. What can I do to help these problems.
hi and welcome 
hm… have you tried to do it again? Usually when I try something and it doesn’t work out the way I want I just keep trying. Usually the third time it works pretty good. 
Try creative solutions!
For example, if you want a normal basketball but it doesn’t bounce,
Create a super bouncy basketball, and then it will probably bounce normally.
And if it DOES act like a super bouncy basketball, then you also succeed!