Is This Normal?

Should fan leaves shapes be similar to new growth leaf shapes........everything else i've grown sort of matches....except for this new strain........pic 1 is fan leaf shape from 1st 4 nodes......very indica-like shapes.......pic 2 after topping twice........leaves look more sativa-like....is that normal?........strain is supposedly 80/20 indica dominant

For the most part, yup.

Your plants will adjust to your growing environment and express them selves with traits that represent that environment. Temps (even temp zones for the roots or the canopy), Rh, Light "intensity", distance of light from the canopy, the list gores on and on for about any variable you can think of.

I have running right now a Diesel strain that has 2 distinct pheno's. One is shorter and has an Indica "type" leaf #1. The other grows taller and express's as a more Sativa dominate with Sativa traits #2. No matter what I do the pheno #1 does not seem to shift - it's very stable, even environmentally.

Now pheno #2 the sativa one will, if popped and run in a slightly cooler environment. With a lower overall RH average then my normal vegging. It will retain it's height but, the leaf expression "slides" to the Indica side and even the bud style will slide with it......
Yet that's all that happens. It will taste and buzz the same.....

So then. What we are seeing is environmental "shifting"...This is a very normal thing for some strains to do. It's not a problem. IF you like. You could experiment by changing the canopy temps and maybe run a slightly lower RH and see what happens..

I have not "seen" this in "pure" strains or Sat to Sat or Ind to Ind pairings.

yes . what doctor who said