I'm no expert, obviously, but CT colonoscopies aren't just tests for cancer. I am guessing they want to find out what is going on. While it is unlikely (though I think it might be possible) that a colonoscopy would miss cancer (it's not at all like a negative FIT test which is only testing for blood in the stool, whereas a colonoscopy is the gold standard), I guess it is possible a polyp might have started developing or that something like diverticulitis or Crohns or ulcerative colitis could have developed in the meantime. I don't know much about any of those things but I assume it's likely that some of them could develop within a year.

Basically, they are trying to find the cause of your bowel problems, whatever that cause may be. 

You are right - they are checking for the other organs in the abdomen due to the worsening and new symptoms. Unintentional weight loss seems to be the main concern and I have an ovarian mass which they aren’t sure what it consists of. They are also double checking the bowel in case a small polyp or other conditions were missed/not active at the time of the colonoscopy. I hope you are ok and I appreciate your reply!

You are right - they are checking for the other organs in the abdomen due to the worsening and new symptoms. Unintentional weight loss seems to be the main concern and I have an ovarian mass which they aren’t sure what it consists of. They are also double checking the bowel in case a small polyp or other conditions were missed/not active at the time of the colonoscopy. I hope you are ok and I appreciate your reply!