Tom, I don't have any experience with "seeds," but am sorry to hear of your continuing problems. Everybody's bowel habits are different, so it's hard to say what to make of that. It doesn't sound all that unusual to me, but obviously I'm not a doctor and can't speak with any kind of authority.
I hope you see some improvement soon on the frequent and sputtering urination. The other problems with the detached retina and the edema may have other causes. Are you on any kind of diuretic? Is Flomax a diuretic? I know Flomax is supposed to help with urination problems, but could it be that you need some type of diuretic as well to control the edema in the legs? Also, have you looked at the Flomax drug info page to see if you're taking any other drugs that may be contraindicated with Flomax?
Good luck and hope things improve soon.