I found while Beta testing that the Apoapsis of the sub-orbital trajectory is slightly lower than the predition line. This is a minor bug that may easily be worked out. I myself don't have the knowledge or software to fix this problem, so I am simply reporting it. I downloaded the full game x64-bit version from the KSP Official Website. This is not a question, and does not need an answer from any non-devs. Thank you.
Devs list:
@Badie
@SQUAD
@sal_vager
@TriggerAu
and @KasperVld.