[Pelayo]

Mark 16:9 through 20, I knew something was wrong with it, but had no idea what until years later when I read that these verses were not found in the older manuscripts

First, what was wrong with them. And Second, were did you hear that they are not in older manuscripts?

[JHavard]

Mark 16:9 through 20, I knew something was wrong with it, but had no idea what until years later when I read that these verses were not found in the older manuscripts

First, what was wrong with them. And Second, were did you hear that they are not in older manuscripts?

Just when I was ready to hit the sack. lol
Well for a starter, My NKJV Greek English Interlinear of the NT, has a foot note that say's, "b(16:9-20)NU brackets vv. 9-20 as not original" and I think it says it in most of the Bibles I own, plus all the commentaries.

[malakhi]

And Second, were did you hear that they are not in older manuscripts?

They aren't. It was a later interpolation, appending a Matthean-style resurrection account to the Markan text.