Hi Damien,
Those Scaled Scores are relatively close to one another, which MIGHT mean that you're improving (but it's also possible that you got a bit 'lucky' in spots or the program randomly assigned you questions that you are naturally a bit more 'comfortable' with).
Before I offer any suggestions about your study plan, you should probably continue studying as you see fit for the next 1-2 weeks (since you're getting back into your studies after a short break). Then take a new FULL-LENGTH CAT (with the Essay and IR sections). That score result will help to define if you're improving on your own or if big adjustment is needed.
GMAT assassins aren't born, they're made,
Rich