Same person, multiple listing?

why, how and what does this mean? there is really only one record; but the name and RM number show up like this for a number of my people?

The names with the + signs represent alternate names. You can turn off the display of the alternate names in the Index by clicking on the the 3 dots icon in the Index.

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James Zedac CONNER is your Primary name for him. Open his Edit Person and you will see that you have also entered the other names for him. (perhaps a census recorded him as J.Z. CONNER).
Turn off alternate names as thejerrybryan suggested.

Or if you don’t need them ( or some of them), you can delete the alternate name fact