I will be transferring frozen 5 days 2 embryos, if i did home pregnancy test at 7DPT and the line was very dark does it mean both has sticked? And if it was lighter one has sticked?

Last cycle I transferred 1 fresh embryo i got a very strong BFP at 9dpt and when i did blood test at 11dpt it was 230miU i think

So i want to know if I conceived 2 will the line will be darker earlier at 7dpt? And if it was light means 1?