Yes, absolutely it's normal. You should only be using SWAP if your RAM is truly being consumed elsewhere. There is a thread or 50 addressing RAM and it's use in linux, but here's a summary:
Linux uses your ram, it knows what to do, and it does it. If you start using swap, that's when you need to look into increasing either SWAP or memory.
You might wanna see what a search reveals on this:
That said... 16MB! Whoa, that's pretty cool. Slack3.5! That's even cooler!
Welcome to LQ btw