Re: negative colposcopy/pos. leep
Well, good for your doctor for proceeding with a LEEP and getting the cells out of there!!!! Yes, it is possible for the colpo not to show anything, but still have abnormal cells in the cervical canal. The cervical canal is not entirely visible during a colposcopy, a key component of the colpo is visualizing the entire transformation zone/squamocolumnar junction (which is the entrance to the cervical canal). If the doc cannot visualize the entire t-zone, the colposcopy is deemed "unsatisfactory" and typically warrants further investigation (such as the LEEP). Some doctors adhere to these standards, some do not (mine didn't). Also, if your doctor had performed an Endocervical curettage at the time of your colposcopy (I'm assuming this wasn't done, but maybe it was?), the ECC might have identified the dysplasia in the canal.
This definately deserves some pretty diligent follow up. Do you know which margins contained the dypslasia (endocervical [canal] or ectocervical [surface])? Get a copy of your pathology report, it should contain that information. If it was ectocervical then that should be easier to monitor. Likely you will have another colpo with an ECC at your next appointment.