1) 2) 3) 5) I couldn't reproduce any of these issues. Could you manually save before each match and then send me that saved game if the following match presents any issue ?
But 1st, rename your "C:\Program Files (x86)\Tennis Elbow Manager 2\Tennis.ini" to "Tennis-bak.ini" (or the .ini of your Profile if you have created one), because the SubBuild 2018.10.23 could have corrupted it, leading to many strange issues. Doing so will reset your settings but not lose your saved games.
4) I just checked and it was working as designed, but there was a flaw : the CPU only aims for a side when doing a normal strike (ie: not an acceleration), but if the CPU checks 1st if it's safe to do an acceleration, decides it's not, then switch to a normal strike, he wasn't checking the aiming side at all. It happens relatively often with the normal setting, and if you had maxed out the Attack bar, then it was happening very often.
It'll be fixed in the next update.
PS: I put back the screenshots in the good order

EDIT:
5) I think I found the cause of this bug : when the Form Of Day was positive instead of negative, it was then corrupted and gave a very negative Form of Day ; I'll upload an update in a little while...

Also, the bugs you get may because of your settings. I tried to view CPU vs CPU 3D match, both with and without preview but it worked normally (ie: no crash).