That sounds fine, snakes poop when they need to, just as you or I do. Sometimes my snakes save it up for 10 days - maybe more, maybe I'm exaggerating a bit - lol. Poop should be brownish, the urinate is comparable to white powder, or white block-like pebbles/stones. If your snake goes into blue it may wait to shed prior to defecating. I don't see any problems with your snakes "poop schedule." Unless your snake starts to go for a very extended amount of time I wouldn't be concerned at all. If you look above the cloacal opening sometimes you can see it bulge out, and then you know you've got a present in the near future.
- h3