Shirt smearing after using gimp?

I designed a shirt using gimp and then i took the template off and when i looked at the shirt all the edges had been smeared and looked like paint had been running off the edges. What could cause that and how do i fix it.

When you save what format do you save to? If TGA are you compressing before you save? Uncheck the compression tick before you hit the save button.....it's checked by default.

I did save it to TGA and I unchecked but it doesn't change it at all
still looks the same like i didn't do anything to it

Use merge layers and not flatten image. Flatten image will remove the alpha channel.

Which edges? There are trouble areas on the av torso -- specifically at the shoulder blades in back and the collarbone in front -- where textures get stretched in VERY weird ways. If the edge of your clothing falls in one of those areas, it can get all messed up. It's a real shame, because it plays havok with some lapels and with things like tank tops that have straps across the trouble areas.

As you realise there are many things a graphic artist will need to know.
Unless you wish to learn the slow way here on these forums, you should continue.
Otherwise, you could also join a gimp forum and get proper, in depth information, mostly without asking.
Here's the top 4 that came up:
http://www.gimptalk.com/
http://forums.tutorialized.com/gimp-66/
http://gimper.net/
http://gimp-tutorials.net/

Only trying to help. Cheers.