Why were there two different character sheets?

https://tvtropes.org/pmwiki/pmwiki.php/Trivia/JonnyQuestTheRealAdventures

Troubled Production: The show's pre-production was... turbulent, to say the least. The project started way back in the early 90s, and Lance Falk approached the showrunners, Peter Lawrence and Takashi Masunaga, to work on the show, but left when he realized that the duo was bent on making their own, "reimagined" version as opposed to a closer-to-the-original project, and went to work on another H-B show, SWAT Kats. While there, he heard rumors that the Lawrence/Takashi project was in trouble, and recruited a bunch of other classic JQ fans to assist him in making a pitch to H-B exec Buzz Potamkin, promising that they could get the show done. But Potamkin promptly stonewalled them for some reason, with then studio head Fred Siebert never hearing of Falk's pitch; he and the others were then laid off, with Lance heading to Warner Bros. to work on Animaniacs. Fast forward a while, and the Lawrence/Takashi team had sunk $11 million over 2-and-a-half years and there weren't any episodes ready to air yet. Compound that with the Galoob toys {based around Questworld} being ready to go and Cartoon Network setting airdates, it was clear that the show was sinking fast. Davis Doi (another veteran of SWAT Kats) was recruited to help bring the project back in line and hopefully make something airable out of the chaos. As a result, four different crews were going to work on the show; Cosmo "Cos" Anzilotti and John Eng would handle the task of trying to make sense of the scraps that Lawrence and Takashi made and turn those into episodes (huge amounts of stuff had to be trashed, re-written and animated just to make some kind of sense). Meanwhile, Doi and Larry Houston would be in charge of a new batch of 26 episodes far closer to the 1960s show, with the Questworld gimmick largely phased out, all the voice-actors replaced, and characterization and designs closer to the original.