I am not sure if I will be much help, but I can certainly sympathise with you. Our DD is 10mo too. About a month ago she started similar behavour. She has decided she doesn't need her morning sleep everyday now, so if she is not tired I dont put her down and put her down about 12ish after an 11.30 lunch and she will have a big sleep of about 2.5 hours.
Re night she started waking about 2 hours after going down. Like you we tried everything, but she wouldnt settle. There was nothing wrong with her, no teething, not ill, hungry or wet. One night she was up from 9pm until 8am. When she was up and out of bed she was fine, she just wanted to play, but as soon as we put her in the cot she would scream the house down.
After trying everything we ignored her and she eventually went to sleep after about an hour. The next night it only took 20 minutes and the third about 5. Now she has completely stopped this nonsense. Most people on EB wont agree with this method, but it worked and she is sleeping better during the day as a result of sleeping properly at night.
This post has been edited by Beancat: 20/11/2012, 07:24 PM