Hi to cut a long story short I had bad pain in stomach bowel movements changing weekly for about year and half.

7 months ago I had a positive fit test, so was referred for colonoscopy where they removed 4 small polyps sent to pathology came bk benign but there was one big one that was 15mm graded IV they removed it but couldn't retrieve to test it. 
I went back yesterday and they found 9 more polyps scattered throughout my colon but there was a cluster of 5 in the same place where the big one was in last colonoscopy they had to clip it after they removed them all

I'm confused after my 1st colonoscopy they said I only had 2 or 3 small ones left to remove.                              how did they miss 5 in the same place the big one was? 
or could they have grown in 6 months biggest was 6mm.

I have to wait for pathology but also on report sheet it's says IBD assessment how do they even test for that?? 

head is all over the place