I have started finishing my basement (full, not a walkout) by painting
all four walls with 2 coats of DryLok.

One issue is that there are 2 cracks on the basement floor, running
criss-cross from middle to middle all the way across each way. It
bisects my rectangular basement 2 times and into four equal parts.
Those cracks are straight and have not changed an iota in the six-plus
years of the house's life. Should I seal them with some kind of
concrete repair product or just leave the cracks as they are and build
over them? Should the cracks even be there? The builder said to me
that they were caused by shrinkage/curing and that they are okay. I
wasn't entirely convinced.

The house is six years old and I have been running a dehumidifier down
there pretty much nonstop in the summers and autumns these last 2
years. With the Drylok applied, the amount of time it takes for the
dehumidifier's tank to fill has increased dramatically...from twice a
day to twice a week.

The moldy/mildewy smell is gone now - it was pretty bad until I cleaned
the basement, started running the humidifier, threw away or sold a
bunch of the stuff down there, and moved a bunch more to my shed that I
built last year.

Now that I've DryLoked my basement I'm trying to figure out how to
start to build out the walls.

To me it makes the most sense to put in a gap so that, should moisture
seep through the concrete (in the form of vapor), the moisture has
somewhere to go. Then I'd put fiberglass between the studs, paper out,
and find some way to hold it back so that it didn't touch the painted
concrete.

Is there a product out there that will hold the fiber insulation within
the studs so that it does not pop out and touch the concrete?

A lot here I know, but I've pretty much decided how I'm going to do
this...I just hope that someone can chime in here and let me know if I
have my head up my butt. Everything I've read indicates that there is
no "right" way to finish a basement...once you decide to finish it,
there's nothing to stop water from coming in if it wants to. What I'm
trying to do is make reduce the risk of water vapor seapage condensing
onto any surfaces.

Thanks,
Tony