Is Overlap Cutting set to 0 in the cutting settings?

If Overlap Cutting is set to any number other than 0 on the Cut Setting screen in Plug-in for Illustrator, the number is added to the number of cuts.

Is the machine's [OVERLAP] setting a number from 1 to 9?

Set the machine's [OVERLAP] setting to [OFF].

Are there overlapping lines?

The same data may have been copied, resulting in overlapping lines. Check the data.