1. revision version fix this problem.
2. /ai3 switch only remove older version of Java 8.
3. If you want to remove older version of Java and install both arches, run it without any switches, then run with /ai3. Switches are cumulative, but there is a problem. See Answer on 4.
4. By default, Java repack will install on C:\Program Files\Java and C:\Program Files(x86)\Java on x64 systems. But when you want install both arches on D driver together, the command lines should enter in this way.
<jre-dual-setup.exe> /ai INSTALLDIR="D:\Program Files (x86)\Java"