Definitely, something wrong here. If you got game from Abandonia, you must have single file "V for Victory.zip" with main V4V.exe file after unpacking. Then after start you have main menu with "Begin new game" list at left, settings list, started with "Battles" entry at the middle, and sub-setting window at right.
Your main setting is "Battles". If you'll select it, you must see 4 major battles at right - and these are exactly all 4 campaigns.
I checked Abandonia's version, in case you are using something else.
(In case of some another version, you are probably installed game wrong. It _must_ be installed over previous installation, three times in row, to merge all companies. Otherwise it will overwrite previous versions, leaving only one, last game - and it seems, this happened with you).
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