I'm not sure whether or not this is useful to the forum, but considering the other cartoon package lists here I think I'll bite. This is the official list of cartoons from primary sources, with some of my own research sprinkled in.

Mutt & Jeff
-Accidents Won't Happen
-Dog Missing
-Egyptian Daze
-The Invisible Revenge
-Mixing in Mexico
-Oceans of Trouble
-Soda Jerks
-They Shall Not Pass
-When Hell Froze Over
-Where Am I?
-The Adventures of Mutt & Jeff and Bugoff
(aka The Weird Adventures of Mutt & Jeff and Bugoff)

The Little King
-Art for Art's Sake

Gramps & Scrappy
-Double Performance (aka Grampus and Scrappy)
-The Under Dog
-Spring Cleaning
-The Dancing Bear

Farmer Grey
-Tuning In

Cartoon Classics
-The Steadfast Tin Soldier
-The Villain Pursues Her
-Toy Shop
-Ain't Nature Grand
-Barnyard Frolic
-Batter Up
-Big City
-Bosco's Woodland Daze
(aka Bosko's Woodland Daze)
-Chinese Lanterns
-Country Boy Rabbit
-Jack Frost
-Love Bugs
-Magazine Rack
-Music and Charm
-Off to the Races
-On Duty
-Puss 'n Boots

Felix the Cat
-Mr. Do-All
-Sunken Treasure
-The Inventor
-Misses His Swiss

Not Listed
-Mickey's Follies
-The Mail Pilot

The package was advertised as having 42 cartoons, but at some point two cartoons were dropped. Notably, they are both Mickey Mouse-related. Mickey's Follies and The Mail Pilot saw Super 8 releases in Europe. The Felix short Scoots Through Scotland is often listed as being a part of this package, but I have found no evidence that such a redraw actually exists.
I have a few friends who live in Germany and are in the VHS scene, 'The Mail Pilot' redrawn is available in a Felix the Cat (Felix der Kater) VHS collection, and they'll be on the lookout for it.

Though two questions, how can we be sure 'Double Performance' is Grampus and Scrappy? And while there's seemingly no evidence of a Scoots Through Scotland redrawn existing, I wouldn't fully count it out, Tommy Stathes made a post a few years ago saying he most likely has the short on VHS, presumably one of those compilation tapes. In the latter's case we just have to wait until he has enough time to fetch it from storage.
How on earth did they get away on doing a color redrawn of "The Mail Pilot"? It's not even PD.
chiming in to say that Mail Pilot was in fact the terrytoon and not the mickey mouse short, but because they share a title and a mouse, r&tvp likely saw fit to remove it anyway lest disney get on their toes.

double performance as listed in the material i was given has the exact same runtime as grampus and scrappy. i feel pretty confident in the research i had done those years past
Could you share the material you were given, if you're still in possession of it?
im not sure if i have permission to (frankly, i never asked) - i can say this came from an old sales sheet with a brief synopsis of the series and running times for each short
that's interesting. i have to wonder if there were a number of these shorts that simply didn't get finished, or perhaps more pulled beyond the aforementioned "mickeys". considering there are cels from what price porky out there where porky is bizarrely redrawn as a human... but the lack of concrete enough info is ultimately why ive stood by what ive maintained (and i will gladly eat my hat if a redrawn scoots through scotland really does exist)
Tommy Stathes
Best to keep an open mind, since those productions and their later handling weren't completely airtight. Unless we've been through all of R&TVP's files, records, film archives, correspondences, contracts, or anything else that was created in-house at the time, it would be overzealous to make authoritative claims one way or the other.
i can provide these quick notes, at least:
-the earliest mention of When Funnies Were Funny ive found in available industry books online is in the 1976 International Television Almanac (i do not have access to the 1975 edition), which mentions there are "42 cartoons" available. every subsequent entry still mentions there are 42 cartoons, even with the sales sheet omitting the two "Mickeys" (perhaps they were still available internationally? could explain why they showed up in europe throughout the 80s.)
-36 of the 42 cartoons are listed in the July-December 1975 edition of Catalog of Copyright Entries

astute eyes will notice the when funnies were funny cartoons all have copyright dates of either 1971 or 1973 (excepting Oceans of Trouble, which has a date of 1974, and two shorts with a '1963' typo). stock music tracks date to 1975 at latest ive found (though i won't rule out the possibility of these tracks being published earlier). i have not yet found mentions of the package from before 1975 in publication, however.
even if there are potentially more in existence, i can at least say this list covers all the cartoons confirmed to have been released and exist.