About a week ago I updated Concrete5 to the latest 5.6.2.1 version. Next I attempted to update one of my sites. In the midst of updating my website, I got an error regarding the header being changed. It occurred at the very bottom of my page. This occurred right after I added or changed a layout bar. In addition, this page was extremely distorted after publishing the edits. Moreover, I had no edit bar to edit the distorted page, so, I had to delete it. I cleared my cache and recreated the page. When I added a page layout it started all over again--and I did not have the proper header (edit bar) to edit most of my pages again. Never had a problem like this for the last three years. This site is about 3 to 4 years old.

error message #1 (in edit mode and in black ink on my CLASSES page:

Warning: Cannot modify header information - headers already sent by (output started at /hermes/waloraweb000/b1937/moo.abletogetitdone/concrete/core/libraries/view.php:978) in /hermes/waloraweb000/b1937/moo.abletogetitdone/concrete/core/libraries/view.php on line 653

error message #2 on same page at the same time(in red ink): An unexpected error occurred.
mysqlt error: [1054: Unknown column 'isScheduled' in 'where clause'] in EXECUTE("SELECT jID FROM Jobs WHERE isScheduled = 1 ORDER BY jDateLastRun")

I ended up deleting this page.

I cleared the cache and had the edit bar for a moment on all pages, then added a layout bar and it start all over AGAIN. And I even got error at the bottom of the (ABOUT US) page that I did not edit when pulling up the site without signing in (so the public can see the error). I have a screen capture of this.

This error appeared when I pulled up the sight in Windows Explorer browser: mysqlt error: [1054: Unknown column 'ctID' in 'where clause'] in EXECUTE("select cID from Pages where 1=1 and ctID = 0 and (cFilename like '/login.php' or cFilename like '/register.php' or cFilename like '/download_file.php' or cFilename like '/profile/%' or cFilename like '/dashboard/%' or cFilename like '/page_forbidden%' or cFilename like '/page_not_found%' )")

The site does not appear stable and a crucial page is missing. I got to get these updates in and I must recreate the page I deleted now.

Environment: This occurred in Google Chrome browser and in Mozilla Firefox browser while editing. A different error occurred in Windows Explorer browser.It seems that if you add a layout it precipitates these errors. My computer is a PC in Windows 8.1 Pro 64 bit operating system. It occurred the same day just hours after updating to 6.2.1. I have been using Concrete5 for over 3 years on this site, kept up with most updates and have never had this problem before.

Please help!