Vasileios, yes - parts sometimes appear multiple times on different plans.
Stergios, hopefully picture below helps. Took a while for me to figure it out.
- The hull plans typically show the part number (this should match the instruction book).
- On the rigging plans, the numbers you see refer to the number assigned to the line/rope, and these are referenced on multiple sheets (sometimes just the start, the end or the whole)
In this case, one of part identified as 165 appears on she