Text Box Overprint Issue and more

[HorrocksFarmMarket]

Hello,

At my job, we have been having an issue with Illustrator CS6 printing a light blue fill in the text box (see image) for all the text except for one text box. I've already looked up forums on overprinting and color management setting but I cannot figure out why this is happening and why the document is printing like this.

I have also had this issue too with current versions of Illustrator with text and images where  the transparent box around an image or text will print as a darker color then the background unless its white. 

Can anyone help me with these two issues and guide me and others on what to do?

Thank you!

[Met1]

Are you using spot colors?

Are you bringing in rgb art into a cmyk file, or vice versa?

[HorrocksFarmMarket]

The document is using process color. Should I have it switched to spot?

The artwork that I use is CMYK for a CMYK file. 

I've also had this happen when using CCID too when using PNG's. both CMYK and RGB art.