I have different contact totals on my iPhone as compared to my iPad and iMac using iCloud.

Hey there, peterfrommtn.

Thanks for updating on the steps you've gone through. Since you've done all the steps in the article, the next thing that can be recommended is to check to see if those un-synced contacts are being synced to your iPhone from a different source, like an e-mail account. You can do this by going into Settings > Mail, Contacts, Calendars and selecting any accounts you have listed under the Accounts section other than iCloud. If an account syncs contacts, it will show a toggle similar to what you see in iCloud; if any toggles are turned on under other accounts, turn them off.
Then, try adding a brand new contact to the iPhone and seeing if it syncs to iCloud.com. If it does, delete the contacts that are not syncing, and re-add them to the iPhone.

Have a great day.

I'm not sure if this is true in your case, but I was under the assumption that all the contacts on my iPhone would be synced with iCloud. This is not the case (at least in my experience). Sometime in the past, I had added additional contacts from other sources to my iPhone. Those contacts aren't appearing in iCloud. In my case, these were contacts from Facebook, Outlook and Gmail. When I got a new iPad, I couldn't figure out why the contacts on my iPhone didn't match the contacts on my iPad from iCloud. Once I added the other accounts to the iPad, I was finally whole!

To add Facebook contacts: Settings > General > Facebook; Sign into your Facebook account and agree to allow the app to share contact information.

To add Outlook and Gmail contacts: Settings > General > Contacts > Accounts; Add the Microsoft and Gmail accounts and agree to share contact information with them.

Another note: The troubleshooting document, Get help using iCloud contacts..., mentions the Groups button in the upper left-hand corner in Contacts. This will not be there until you have contacts from more than one source/account. I was having fun trying to follow the directions, and the button just wasn't there until I added my other contact source accounts.

Hope this helps!

Hi, peterfrommtn!

Thank you for using the Apple Support Communities. From your post, I understand that you have a few contacts on your iPhone that aren't syncing to iCloud, and do not appear on iCloud.com, your iPad, or your iMac as a result. I rely on iCloud to sync my content and keep all my devices up to date, and would be happy to help make sure your contacts are syncing as expected!

You've already started with some great steps to troubleshoot; from here, I would suggest going through the following article, taking any steps you have not already done.
Get help using iCloud Contacts, Calendars, or Reminders

Cheers!