Actually bent arms and legs are both up to .3 each and leg separation would be up to .2. It is all in the degree to which the execution error occurs. Extreme bent legs would be a .3 deduction, medium would be a .2, kind of bent legs would be .1 and tiny bends are .05. Same with arms. So, if she is extreme on her first and only medium on her second she could likely be receiving .8 (.3 bent legs, .3 bent arms, .2 leg separation) on the first backhandspring and .5 (.2 bent legs, .2 bent arms, .1 separation) on the second. This doesn't take into account the additional deductions that are specific to the L5 BHS skills. This includes an up to .2 deduction for lack of acceleration in the series. Obviously, without seeing the series I can't say for sure how extreme her leg bend is...just speculating.
A good place to find all of this information is: Link Removed It shows all the general deductions as well as major element specific deductions.