GCSE sittings -if I sit GCSEs in 2 blocks will universities offer place?

I am home-educating and am in lower secondary. I would hope to go to uni after GCSEs and A levels. I know I could do more subjects and at better level if I split my subjects into 2 blocks for GCSE (well IGCSE as I'm not in a school). I had heard that universities might look less favourably on students who actually do just that -a set of GCSE results at eg age 14 and more GCSEs done at 16 even if A levels all tkaen together. . Has anyone had that experience? TIA