"to muddle up" in Spanish

CONTEXT EXAMPLES
Context examples for "to muddle up" in Spanish(!) These sentences come from external sources & may not be accurate. Therefore, we are not responsible for their content.
I always muddle her up with her sister
siempre la confundo con su hermana
We must clear up this muddle and restore legislative consistency as soon as possible, and therefore we must adopt the Commission's position on the directive as regards biogas.
Tenemos que aclarar este embrollo y recuperar cuanto antes la coherencia legislativa, por lo que es preciso adoptar la posición de la Comisión sobre la Directiva en lo referente al biogás.