Webform content not getting saved to database, not showing up in "results this webform"
My site is in Drupal 5.7 and have converted all my surveys to webforms using the survey_webform_migrate module. I have a webform with several form components. When I look at the webform_submitted_data table using MySQLadmin, I can see that data from only three fields is being saved to the database (my webform has 5 fields), and there is no obvious logic to how the module is assigning cids (which I assume stands for component ids). Also, when I click on "results this webform" while logged in as an admin, I see only the data from those same three elements (which I guess is not so surprising if the data is not in the db).
Has anyone else experienced either of these problems with webforms? I am concerned that I am losing data.

data loss when saving webform
I had the same problem. I was helped with the advice to upgrade to webform 2.2 (5.x-2.2 in your case) which solved the problem.
The problem in the original case was that the form_key was numeric. My case was that my form_key was close, such as 1a, 1b, as well as other form_keys being completely numeric.
Hope you didn't get turned off by this problem already.
-Brad