Be gentle, Its my first time..

Hi All,
 
quick question about the below program which is located under the beginners guide;
 
I've started weight training for the first time - I've been going to the gym for about 3 weeks now, without guidance, but have been sticking to a routine similar to the one below. I've been splitting this over 3 days (legs, back & shoulders, chest & arms) my question is; should I be splitting it over 3 days or should I be carrying out the below every time I go?
 
 
A basic male beginner's programme could look like this:
Flat bench press 2 sets x 12-15 reps Lat pulldowns (front) 2 sets x 12-15 reps Tricep pushdowns 2 sets x 12-15 reps Leg extensions 2 sets x 12-15 reps Seated leg press 2 sets x 12-15 reps Seated leg curls 2 sets x 12-15 reps Cable curls (bicep) 2 sets x 12-15 reps Lateral raises 2 sets x 12-15 reps Standing calve raise 2 sets x 12-15 reps Sit-ups/hip flexion 2 sets reasonable failure This routine should be followed in the correct order working at 50% of your one rep max. This means a work-load of half what you could lift for one repetition. Still try to increase the weights when you can, keeping correct form, but not at the sacrifice of your reps; these must still be completed. Rest time should be between 90 and 120 seconds.

You should be aiming to do a day on each so example :-

legs (monday)
back & shoulders, (wed) 
chest & arms (fri)

you dont have to stick to the days I have suggested but make sure you are leaving a days rest in between a muscle group, so for example if you do biceps on monday leave it at least a day before working them again.

So I think you have been doing it right anyway but hopefully this has clarified it for you.

Anymore info needed Pm me!

I'm pretty new but from what i've read I'd do this.

Monday  -  Chest + Tri's
Wednesday  -  Shoulders + Legs
Friday  -  Back + Bi's

Hope you find something that works for you.