Photoshop CS - Optimized image file size changes back to original image size on re-open. HELP!

Software - Photoshop CS

I have a 100x100 image that I've been trying to optimize. Original size 29.3K. I did the "save for web" thing, and selected jpg at 80% quality, which dropped the size down to 4.031K. Then I clicked Save, and thought all was well.

Question - When I re-open the image, and do the save as bit again (just to make sure of the size) the image shows as being 29.3K again. What is going on? Why am I not seeing the image size that I had saved earlier? Can someone explain this to me please?
CementTruckAsked:
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TomeeboyCommented:
When you use "Save for Web", it is essentially saving a copy of the file (just like "Save As").  It will remember the last folder you saved an image to using "Save for Web", so that is where that copy of the image will be stored if you don't change it.  The original file, and what is currently loaded in  Photoshop, remains unchanged.

It sounds like you have simply saved the file in a different folder without realizing it, but were expecting the save to overwrite the original image.  Try "Save for Web" again and pay close attention to where it is storing the web-optimized image.  Also, be sure that you are going by the file size shown in the top-right pane of the "Save for Web" previews (the four images is shows you), as those are the settings the file will be saved under.  The bottom two preview panes are alternative options that show you how the image would look if you optimized it even more.

Hope that helps!
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CementTruckAuthor Commented:
I've been paying close attention to the folder to where the image is saved, and it is the right one. I've even opened "My Computer", browsed to the correct folder, and file, and did a right click, properties, and it shows the correct size. I'm wondering if that 29.3K is a "standard" os some sort.

No worries. After looking at the file size in "My Computer" and seeing that it was saved at the proper file size my worries are over. Must just be a bug.

Thanks for responding.  
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