Here is the response from Brett at RTI to my posted questions...

Hello Troy,

If you have two system macros embedded in another system macro, you do not need to add any additional time delays between them as they will run in succession. You only need time delays between system macros when they are being sent from a remote button macro in Standalone mode because the remote does not know if the processor is busy and the processor can only do one thing at a time. Therefore if the processor is running a system macro and the remote sends another trigger code, the processor will just ignore it.

A flag event will take a 5-10 milliseconds to run, so clearing 8 flags will probably take less than the minimum length of time delays which is .1 seconds. However, to be cautious, you might make your time delay .2 seconds to give the processor time to move to the next trigger code. A flag does not have a time delay built in by default like an IR code.

Also, most IR commands take less than .2 seconds to run depending on repeats. Those .3 second delays are there to give separation between codes so there isn't constant stream of IR coming out of the emitter/remote that might "confuse" the equipment. Therefore, if you wanted to be safe, you could assume .4 or .5 seconds per command delay should be sufficient when adding up time delays between system macros triggered from a remote button macro in Standalone mode.