org-forward-sentence moving by paragraphs, not sentences?

[Roland Tarver]

Hello All!

First post here :-)  Fairly new to emacs - please be gentle with me! haha.

I am using org-mode (which is just amazing!) and I seem to be having 
trouble with moving forward and backward by sentences.

The M-e key is bound to org-forward-sentence and the M-a key is bound to 
org-backward-sentence. However, when I press these keys the point moves 
backward or forward by paragraph, not by sentence.

In an effort to exclude incorrect key bindings, I have run the functions 
using M-x org-forward-sentence and M-x org-backward-sentence. This has 
the same result - moves by paragraphs only.

These results have occurred in the org file that I am working with at 
present. Interestingly, M-e and M-a work as they should whilst moving 
through the online tutorial (C-h t). The tutorial buffer opens in 
fundamental mode. I have opened my org file in fundamental too - still 
the problem persists.

Any ideas?

Many thanks

Roly :-)