What type of export filter are you using. Fountain fills or Gradients are vector based not pixel based so you should export fills as PDF and if you do that and not change the default it should open up in Adobe Reader as a CMYK doc. If you wanted members to have a look at your file to see if they are any problems with it you would need to provide a link to Cloud/drpbox as you can't receive PM's yet not enough posts.
Design is thinking made visual.
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