Pshop CC -- saving JPG & PNG file size bloat

Saving JPGs & PNGs from Photoshop CC is creating what I can only describe as a obscene file bloat. Just recently, what should have been a 7k jpg saved as a 1.1 mb jpg file. PNGs which should average roughly 100-150k are coming out at 1.3mb. If I use the "Save for Web", sometimes it gives me the proper sized images.
I have noticed this on 2 computers --- one a mac & one windows with completely different file sets. So it is not an issue of my OS, the original files or anything specific to one particular common item.
FYI -- Doing the same thing with pshop cs6, I get the proper file sizes.
I have included a sample image here. This image is a straight out "save" from pshop CC -- it is 1.1mb. However, when I saved the same image as a JPG in pshop cs6, it was 7k.
Is anyone else experiencing this issue?

Haven't had a PNG or JPG go wacky here in that way so far...
I think the issue is revealed by looking in File - File Info in the Raw Data section. I don't know why, but there are a huge number of <rdf:li> XML elements showing up there with hex values in them. I don't know what that means, exactly, but I believe the accumulation of that metadata explains the size increase.
Do any of the terms you see in the raw metadata mean anything to you? Do you have 3rd party plug-ins that could be responsible for this?
-Noel

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I would appriciate if someone explained me what I'm doing wrong.
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Can someone tell me what's wrong, or what I'm doing wrong?
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Ok guys, thanks a lot for patience. Below is the main cause why I started this topic, but I still can't figure it out. I thought the loss of size is the cause, but you say it's not :/
I'm not that skilled as you guys, so that's the primary reason why I'm here. I will be really gratefull if someone could give me a hint here, or some small help.
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Below is a screenshot from this application
[img]http://img21.imageshack.us/img21/5396/41135434.png[/img]
On the right is the picture that is the root of my question here. It has to be in the format with palette of collors in amount of 16, although I have no idea where it stores the alpha channel information, as there are 4 bits for color per pixel. Well anyways, you can see on the right top corner the palette. It basicaly has only the shades of gray in this case. I can switch now to the alpha channel mask, and this is what I get:
[img]http://img29.imageshack.us/img29/4089/69176653.png/img]
You can see that each of the colors in the palette has different alpha values. Now what I tried is, I exported the image, I opened it with photoshop, saved it, imported it in the program, and guess what I found in the alpha channel mask:
[img]http://img821.imageshack.us/img821/7104/51957014.png[/img]
All the information of the alpha channel for each color is gone!
Here are the examples with more colors(256):
[img]http://img853.imageshack.us/img853/2108/84834785.png[/img]
The alpha channel mask
[img]http://img718.imageshack.us/img718/4944/25526459.png[/img]
And now, I do the same as before, export it, save it in photoshop, and guess what, all the info is gone again:
[img]http://img577.imageshack.us/img577/8991/50003321.png[/img]
Now loosing this information is not a problem, as I will be inputting different pictures, but my question is, how I can achieve the same effect in photoshop for my images that I will try to import. I would love to have as smooth edges as they are seen on those examples above.

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Pshop CC -- saving JPG & PNG file size bloat

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