help with preparing a InDesign CS2 file for print

[CaptainChunk]

I am guessing that my problems probably seem simple to most to know anything about printing, but I don't know anything.

I have a 12 page file I need to get prepared for printing. I outputted a X1a PDF and sent that off to our client and then to their printers. The printers emailed back a list of things that are wrong with the PDF. I don't even understand their terminolgy entirely. A few examples of the issues:

Page 2 top and bottom photo bleed is missing.
Page 4 shadow below blue bar has no bleed.
Page 5 top and bottom photo bleed is missing.
Page 6 top photo bleed is missing.
Page 7 bottom photo bleed is missing.
Page 8 both images are low resolution.
Page 8 shadow below red bar has no bleed.
Page 10 shadow below both bars have no bleed.
Page 11 red bar has short bleed.
Page 11 shadow below red bar has no bleed.

The terminology like bleed is missing, or no bleed, short bleed. I just don't get what it is referring to. I set the bleed to 1/8" in the InDesign fle. Thanks for any help you can provide.