I wouldn't worry about it yet. Ten pounds is barely enough to notice a difference in how your clothes fit (especially the first ten), so we're talking at most a difference of a half-inch here and a half-inch there -- and as others have said, perhaps even none yet in the places you're actually measuring), easily within the range where measurement error could mask a true change. If you changed your diet drastically, some of that initial ten could even be water weight, which wouldn't affect the tape.
Do what you need to do, and change will come. It can't not.
And just an anecdote as to how everyone loses weight differently: pretty much the first place to slim down on me was my hips (so my pants actually did feel very different after ten pounds, but this is not the case for everyone). However, the last 20 pounds? Barely a change at all! I'm still wearing the clothes I bought at 165 pounds, at 145 pounds, and they're mostly on the loose side, but still wearable. That certainly wasn't the case for any other 20 pound interval along the way. So yeah. Don't worry, keep it up, it'll work out.
Height 5'8 1/2"
GW: Originally 150. Maintaining at about 146 since June 2013.
5K 4/21/11: 31:55
|40 Maintenance Weeks