I've missed an important change mention in the changelog:
- Moved Mutations that weren't created by me in a new list called "Guest Mutations".

This explains everything and i cannot belive i've overlooked this when reading the changelog.

Basically all the mutations missing from their listed category in the spreadsheet found on google docs are now under the Guest Mutation category. It would be nice if the creator of the spreadsheet could correct this to aviod further confusion but i would not count on it at this time.
I might make an updated version myself at some point which reflects this change and more.

Case closed.

I've located the "missing" mutations, please see the first reply to this topic.

Originally posted by Team-tactics:

I am missing a lot of the mutations listed at:
https://docs.google.com/spreadsheets/d/1LF8CPTjFlwJ7mNZSxk8lofdz3bVh_IqZA3fLpJXd8q4/edit?pli=1#gid=0

And i cannot for the life of me figure out why; and there is no mention of their removal from the changelog included here: http://www.gamemaps.com/details/2862
and the changelog here: http://gtm.steamproxy.vip/groups/Rayman1103_Group#announcements

Here is a screenshot of my main menu:
http://puu.sh/m3HCE/b2763026e1.jpg

Here is an official screenshot:
http://www.gamemaps.com/imgmgr/limit/img/addons/l4d2/ss/rayman1103_s_mutation_mod_2862_13.jpg

Examples of missing mutations:

Campaign mutations 4 is completely missing - and their two mutations: Special Ignition and Special Surprise are nowhere to be found.

I've only got only one solo mutation: One against many
In the spreadsheet, there are 7 listed in the Solo category

in Two-Player i've only got: Left 2 Die, Right 2 Live and Two Against Many

In the spreadsheet, there are 8 listed in the Two-Player category; including:
Horror 4 Two
Horror 4 Two: Mercenaries
Horror 4 Two: Outbreak
Karma Bros
Left 2 Die
Right 2 Live
Traveling Light
Two Against Many

In Realism i've got these 6 Mutations.
In the spreadsheet there are 10 Listed.

The list goes on. What am i missing? I've seen no mention of these mutations being a seperate add-on for Rayman1103's Mutation Mod, nor have i seen mention of their removal.

The menu list for my mutaions are the same no matter if i use the addon from:
http://www.gamemaps.com/details/2862
or the steam workshop.

Any information appreciated.