It actually just seems like it is more often online because you are seeing way more hands per hour. If you are using a hud, look up your stats for hands and I am sure they will fall in line.
Also make sure you are betting properly, I am not saying that your not, but I used to get sucked out on alot more when I would limp in alot, min raise if I hit instead of pot raising, etc...
It also helps a bit to know that in order to get sucked out on, you have to get it in good.
Good luck.