The curving rise is caused by your angle of decent on the ball being too steep. Take the club back low and long to the ground, and try to swing up on the ball. This will decrease the angle, and impart less spin on the ball causing a straighter flight.

As for those pop-ups, make sure you are staying constant in you spine angle. Its easy to get a little lazy and start to let that dip and rise which will cause you getting under the ball too much. Create a good base with your back leg to sit on in your takaway. Sometimes if you let that straighten on the takaway, you rise up in your spine and then have to dip back to make contact, going to far will get you under the ball poping it up. So keep that back leg flexed through the top of the swing.