I think you are using way too much exercises in your workouts, i suggest you to drop most of your exercises as i think you may be over working some body parts and use compound exercises like bench press and squats, deadlifts. Separate your workouts a bit more to allow your body to heal and grow, i workout the same body part every 5-7 days. You may benefit from incorporating an exercise like the chin up, pull up or pull down in your upper body wo because they work the antagonist(?) muscles of bench press and other pressing exercises, bench press works chest, triceps and front delts while the pull up/chin up works the biceps, lats and rear delts. Edit: Sorry i didn't pay enough attention to your initial question, what comes to my mind is, due to the high amount of exercises working the same muscle groups ypu are distributing your strength in small amounts between this exercises making the work out more oriented to endurance instead of strength and mass. Now endurance training is not optimum for mass gains acording to some studies i have read about and it can in turn make you lose some mass. You also have to consider that womens naturally tend to have a slightly higher body fat % so that might be helping you gain fat.