That is, I don't know why your TOC is behaving that way, except that I found that in your language translation preferences, Arabic was set. I changed to English and French, but that did not seem to have any effect. However, by copying the entire document, minus the final paragraph mark (there are two empty paragraphs at the end, shown when you display hidden characters (Home tab, paragraph symbol, or press Ctrl+Shift+8), and pasted into a new Word doc. the TOC function works fine.

Hope this helps.

Ulodesk