Hello,
that might be because you have "preventing duplicates" turned off and thus JoomSEF is not numbering the URLs, otherwise, you would most likely get something like:
individual-giving-2
individual-giving-3
...
(or if you have them, then on the contrary, you may need to turn prevent duplicated on)
Anyway, that is not the source of the problem - that is in the fact, that there exist several nonSEF URLs (often varying in some small details) for which JoomSEF can generate always same "individual-giving" URL.
You need to identify why there exists more nonSEF links to certain content and need to eliminate them, so they do not even appear in the page source. (often this is due to inconsisten internal linking or components source code, like when authors are rendomly using extra vartiables in the URLs, that however have no real effect)
More on this topis is both in FAQs and documentation -- look for preventing URL duplicates.