I have quite a few of these as well, where a segment (30 cM or smaller) passes fully intact from my dad to me. I have the same effect on my mom's side. ( I don't have many close cousins on either side that have tested so I'm playing around with fourth cousin results too) So Gedmatch doesn't really change the generations to an estimated common ancestor from since it's based on the amount of DNA.
I could see where these segments sort of stick together, but you only get half of the segments, instead of cutting the DNA in half. (For instance- my mom's admixture comes up with 19% UK where I only inheirited 2%, so I must have not inherited those segments, but I tended to inheirit her others instead)
Without getting to technical, DNA is long codes made up of C T G and A, grouped by three's, the DNA is read to make diifferent substances. So a code could be GCG AAA CAC TGT ATA. It would make sense that there was some way to insure "AAA CAC" sticks together so it doesn't make nonsense code and make an error that makes a baby non-viable.
These segments and the fact that I keep getting matches estimated to be 4th cousins who actually are 10th cousins (with no closer brickwalls that would make 4th cousin possible) have got me wondering about what I think of as "sticky segments". (Some of those matches I can partially accept there may be even more distant pedigree collapse we can't see, when they were Mayflower ancestors or something where it may've had a smaller breeding pool that are boosting results)
It makes me wonder about our accepted ideas of how our matches should share our DNA. I think a lot of these ideas are based more off of statistics and the chance that DNA doesn't get passed down. So you have 64 fourth great grandparents who all had 23 pairs of chromosomes. that's 46 chromosomes times 64=2944 Chromosomes of info. So I can see where it's rare to have had the same info passed down two seperate paths, and I think that's how many charts are written. The probability instead of the outlier chance.
In my mind, it's more like getting copies of half a book collection (solid pieces, also copy's because you inheirtiting it doesn't bar other descendants from getting it) than a copy of half a gallon of water (a liquid mixture that can dilute and mix). Ok, I admit I need to work on that metaphor a bit, but a book collection kinda works- each person has a set bookshelf size and can only hold so many.