My packaging shows 4 process inks even though there is only a black and white image. My pdf image was first saved as a grayscale. When that didn't work, I converted it to a Gray Gamma 2.2 Grayscale in Acrobat and "saved as" my image. It still shows up as a 4 process color. Interestingly, when I check separations, it shows up as only black.
To check my InDesign, I completely removed everything from the document and left a blank page. The packaging still shows 4 color process.
Verified in Ink Manager that Convert Spot to Process is not checked.
Is there anything else I need to check?
No, but undo the Gray Gamma 2.2. I am not familair with the result, and may be appended, but it is not necessary.
There will always be the CMY channels listed in Adobe Products; you correctly verified only black is in use via the Seperations Preview.
InDesign package always lists cmyk inks.