On Tuesday, 11 AM was 4643 and 12 PM was 4644, which means two episodes were skipped between 4602 and 4643.
Actually it was just one (4625). You might be factoring in 4633, which was skipped outright within the regular cycle.
As of 1 AM Eastern on 01/27/2021, they're airing 4673. Currently, with the announcement of new episodes starting at 10 AM Eastern on 02/02/2021, I'm not sure what to expect from 3 AM to 10 AM next Tuesday. I was able to figure out that if they continued skipping the episodes from Saturday's Marathon within the current cycle, they'll loop back to the beginning on Thursday at 11 PM. From there if they aired their first 100-episode cycle without any skips that would result in 4791 airing at 2 AM on 02/02.
By 2 AM on 01/27 there are still 7 episodes left from Saturday's Marathon that might get skipped. However, if they decide not to skip those, it will result in the first 100-episode cycle ending within the 9 AM hour on February 2nd, just in time for the next 30 to start at 10 AM EST. Furthermore, if they end up airing episodes 4701, 4722, 4743, 4751, 4753, 4755, and 4781, then at 6 AM EST on Friday, we should loop back to 4581 one last time.
I don't know or think they air those seven, and if they don't, I guess there will be 7 hours to figure out before they get to the Drunken Models Episode