Increasing evenly in the round means you'll space those two increases away from each other in your round. You could do one after your first stitch, and one right in the middle...know what I mean? Putting them both at the end of the round increases doubly in that spot, rather than spreading the extra width evenly.
When you're working in the round, knitting every row is stockinette--in the round, you'd have to knit one row and then purl the next to get garter. I know it seems counter-intuitive, but it's because you're not turning your work like you would if you were working flat. Make sense?