Read
www.hardgainer.com to learn about 'overtraining'.
Early on, you can probably get away with some, but that's not necessaarily a good thing. Later on the muscular adaptation curve you won't, so it's probably best not to get into the habit.
If you're doing 10 reps, add weight and get into the 6-8 rep range but keep your alternate day schedule. You'll do better. Eat right, also.