Fields disappear after using the Reduce size save in X pro

Question

My many form fields literally are gone after doing a save as>Reduce File Size  command in the new Acrobat X Pro.
I have many pages that I have anywhere from 30 to 50 interactive fields to fill in, I had tested the forms closed the file reopened and then because the file size was a bit more than I have seen in the earlier version of Acrobat, so I used the Save as>Reduce file size command on all my pages after seeing in the folder that my interactives went from 1050 KB to around 500, so I did every form one after the other.
Well when I went to start loading them in to FTP and testing them after placing on the web when clicking on the PDF it has no fillable fileds, well I thought what, so I opened that same file on my computer and nit came up the same, and the last thing I had done before starting to upload was to do the Reduce File Size command.
To have all my fields wiped out like this is crazy, I have no way to recover them from what I can tell, unless Adobe has a miracle fix, which I'm hoping.
I can't find any setting that says it removes form fields upon save!
Can somone tell me what has happened and maybe why, I have doing these type forms for years and have never had this happen, I'm Wary of this new Acrobat, I can't see the old history menu, where you could see pdf's that you created a month ago or more. Why does that screen stay on in the center of the program all the time, most of those have a close box that you can get rid of it. Is there a way to turn on the old 9.0 menus everywhere, and can you move the right side column to the left side somewhere, it just is easier for me to use.
Things seemed to work relatively good in the old version, why some many drastic changes, it ends up slowing my production down, and now i'm behind on my work load.
I'm all for improvments, but really why change everything, it seems counter productive even for Adobe, unless someone is trying to justify their employment.
I apologize really frustrated here.
Any help to recover would be great.

Answer 1

Thank you LoriAUC, it was definitely the Reduce File Size command. Although I have used the Optimizer in the past in older versions of Acrobat I did not use it in this case.
I have been doing this exact same work with Acrobat from the days of Live Cycle or what ever it was called, and just a few weeks ago I was creating the same interactive's using the same files for a different client, using the Acrobat 9 pro I believe in the built in "Forms" builder.
I think where I may have screwed up is I had always done my Reduce File Size before I made the form interactive, this time I happened to see that each page was over 1 MB and I know that the non-interactive version that I also post on our website is more like 200 KB, so when I saw that they were over 1 MB, I decided that I was going to use the Reduce File Size after I had finished all of my 13 pages of interactive's.
I did not think to check the first one to see that the interactive was still functional, and proceeded to change all of them by quickly opening doing the save as reduce file size and then closing, and it took a whole 3 minutes to undue/ ruin the hours of building the pages with the 30 to 50 field areas that were interactive.
I don't wish to replicate it right now, but I will attempt a test with some made up test files to verify when the deleting of the fields took place, because there was data in the fields, but it was now flat and when you click on the edit in forms, it asks if you want to have the wizard place fields because no fields are in the document, or something to that effect.
I will let you know the outcome of my experiment.
If you come up with any other info I would be very interested.
Thanks again for the help.
Sincerely,
Omnia Guy