What instrument they used to put the barium in with matters less than how thick it was. If you expelled a liquid, not a thick paste, then it was not correct. The films seemed OK, taking them before during and after evacuation. They did not have to use the same terminology with you for them to be taking films at the appropriate moments.
The oral contrast might have shown defects outside of the pouch.
Also, just because you were able to pass the contrast with ease, it does not mean that pelvic floor dysfunction or structural defect was not seen. The whole point of the exam is to visualize the mechanics of your defecation.
What has your doctor said about the images?
Jan