I would like to reply to the question put forward for further clarity...
Why is there not a check after step 1???
These plugins require all settings and configuration to be saved prior to post creation. The notice is regarding post creation itself which is performed last. There is no possible check that can be done early, not without guessing or making assumptions.
Other importers guess the users needs and wishes. CSV 2 POST does not. It is a plugin for professionals who want to take full control over the websites they build. However in response to people struggling with such an advanced plugin we decided to stop providing so many features and reduce the interface down to what most plugins offer. Sometimes more is not good and that we do understand. We hope you try our next version.
I'll finish by confirming what Zara basically said. The notice may mean very little but I do admit it seems more serious than it is and that it needed changed. Which it was about a week back and will be delivered in the next version. We are on the ball :)
The notice could indicate one custom field for one post out of 100,000 posts was not saved successfully. These things happen and unlike many CSV importers we do not avoid alerting the user just to brush issues under the rug. Hell knows how many auto-blogged websites out there have some un-finished posts that the owner will never notice due to the massive amount of posts blogged. This is what we wish to avoid and deliver more accuracy/quality.
I am sorry if you feel you had bad experience but we are here to help you continue your need for auto-blogging.