As other end users who cannot touch nor remotely access your computers, sometimes the only option we have is "take to to Apple." However, I had some thoughts about an array of computer showing the same weird power behavior.
First, how many devices are showing this pattern? Cycle counts and Max Capacity do not, as you observed, raise any red flags for me. The charge/reading issues you report would lead me to say the battery was failing IF it only affected one computer. But it doesn't. So...
As more than one device is involved, are there any commonalities that might help us help you:
— are all devices on the same power system?
—If on the same system, has a professional checked that system for "dirty power," surprisingly common in older commercial buildings.
— has the system suffered any surges?
— if you carry a device to a totally different power system (like home to work, of vice versa) do the issues persist?
—Are all running the same version of macOS? Please tell us what versions are running.
For a single computer, an SMC reset is appropriate if the charging system shows oddball behavior. Not so much with a bunch of similar computers. However the SMC reset remains an easily-done option, but note that an Apple Silicon computer must be on wall power for the reset as shown in this Apple article:
Reset the SMC of your Mac - Apple Support
I'll check back latter. I love a good mystery!
