InDesign exporting my CMYK print PDF to RBG every time

I have used Adobe InDesign many times before, to create catalogs, booklets, posters, and other print material. I have never had this issue before. I have not used the program for about 6 months, and have since gotten a new laptop. I am wondering if this is possibly a glitch on InDesigns end from a new update.

I have created a print ready PDF in CMYK color format, but when I export to PDF and open it in Acrobat, the colors are vibrant, which I assume are RGB colors. 

A bit more information...

- I have exported one page as a JPEG, and the CMYK colors are accurate as they appear in my InDesign workspace. 

- All of the swatches used in InDesign are set to CMYK

- Transparency blend space is set to Document CMYK

- The file is set to print in document setup

- All of the Illustrator graphics I use in the InDesign file were made in CMYK color mode in Illustrator. The individual swatches are also set to CMYK in Illustrator.

- I have tried exporting as [high quality print] preset (which is what I have always used in the past)

- I have tried exporting as preset: [PDF/X-4:2008] standard: PDF:X-4:2010

- I have tried 'no color conversion' (which I have always used in the past)

- I have tried 'convert to destination'

- I have tried exporting as Acrobat 5 (PDF 1.4) (Which I have always used in the past)

- I have also tried exporting as Acrobat 7 (PDF 1.6)

Can anyone help me figure out why this would be happening? And if there is anything else I can try to fix this?

Thank you!