COmmand based software Interrupts

[Sparkyshires]

Hello again! I'm back with another (possibly) stupid question. Does anyone have any documentation on how command interrupts are handled in command based code? I'm having issues where effectively command 1 which requires subsystem A gets called initially, then before it finishes command 2 gets called which also requires subsystem A, but then they both keep getting called in parallel (I am not using command groups)? I would love to know what exactly goes on inside the code and what order functions are run in, etc., etc., for when situations like these happen.

My google-fu and delphi-fu isn't doing much