Looks like I should have looked closer to home than all over the web! I watched more closely at the boot-up procedure of my RPi and noticed a FAILED step involving dhcpcd. I looked that up on the web and found that newer distros don’t want you to edit the file /etc/network/interfaces. See this link for more information:
https://www.raspberrypi.org/forums/viewtopic.php?t=203530
I followed the directions there and then went back Raspberrypi.org to follow the directions for properly (and easily) setting up my wifi. Once I did all that the dhcpcd error was gone and my MM2.5 reboot issues were resolved.
Case closed.