Sure. I'll try.
Two main groups of muscles of the upper leg, quadriceps in front and hamstrings posterior. What is interesting of them both is that span two joints. Originating on pelvis and inserting below knee. This give them each two actions. Quads do flexion at hip and extension at knee. Hamstrings extend at hip and flex at knee. The quads being the largest muscle group in the body are the primary movers in cycling due to extension at the knee. The hamstrings don't provide much synergy here, they are rather weak in this motion. The hamstrings do come into play on the back part of cycling to help bring the pedal around. Consequently the hip flexors provide little help here also. The opposite leg is also now coming over the top to provide the real driving force. With me so far.
The gluteus maximus on the other hand are a weak accessory muscle. They don't do much of anything at all. Walking, jogging, pedaling, They are simply not used. Where they are used is in more forceful exercises. Running faster, uphill, jumping etc. Now what happens when yous saddle is lower than it should be? Your hip angle closes too much at the top of the stroke and your quads are now at their weakest and most vulnerable position. So, in order to achieve the the desired power your glutes are called into action to what it really does not want to do. They are overworked and you get the muscle soreness. Some of that could also be your upper hamstrings.
Another example of how this all works. Squating. If
you go half way down you have the most power and can lift the most weight. Go down to knees at90deg and it gets more difficult. Lower and even more so.
Would I keep my saddle at the lower position and get used to it? No. It most likely was not too high in the first place.
Another position to avoid is saddle too far behind BB. Too much strain on hamstrings.
Hope that helped