Dual monitors with mid 2011 Mini

I have been running two identical Dell U2414H monitors on my mid 2011 mac mini running OS Sierra (latest update). The "main" monitor is connected from the Mini's mini-display port output, the other from the HDMI connector. For the most part it works fine, I can drag windows back and forth, etc.

However, sometimes when I start the computer the monitor designated as the main monitor goes blank and the secondary monitor is the only one showing, and the screen just shows the background, login prompt,no launch bar, menus, etc. I have to unplug the HDMI and mini display port cables, plug the display port cable back in first until the main monitor shows up properly and then login to the computer, then I plug the HDMI back in. Sometimes the computer starts up both monitors without issue or sometimes the secondary monitor does display all the menus, etc.

It's annoying more than anything but I was wondering if there is a way to make this more reliable and/or if there is a way to daisy chain the display port cables from Mini to main monitor then out of main monitor to the secondary monitor, the Dell's are capable of theses connections if the Mini will support it.

Thanks for any assistance you may have.