Zefah, when doing Starting Strength you are supposed to do 3 sets of 5 across. That means that the weight stays the same for those 3 sets. Those are your work sets. Everything else is a warmup and volume should be much lower on those. It's not a problem now that the weights are light, but it'll be a problem once they get heavy.
As an illustration, suppose that your work sets for squats are 115lb for the day. So your squats would look like this:
Warmup
45lbx5x2 (2 sets of 5)
85lbx3 (1 set of 3)
100lbx2 (1 set of 2)
Work sets
115lbx5x3 (5 sets of 3 at 115lb)
Next squat session you'd add 10lb to your work sets, so your work sets would be 125lbx5x3. This applies to all the lifts, except the deadlift in which you only do 1 set of 5 as your sole work set.
I mention this because I see some novices making the mistake of doing too much work on their warm up sets. In Starting Strength it is the 3 sets of 5 across that constitute the meat of the training. Warming up is important but it's just that, a warm up.
