The view through the eyepiece tube of the reflector telescope can be confusing. This page will hopefully help.
A sheet of yellow paper has been placed behind the secondary mirror.
The view through the focus tube of a typical 200mm (8″) f/6 Newtonian Reflector
Showing n reflections in the sight/focus tube > secondary mirror1 > primary mirror2 > secondary mirror reflection3
Using a Collimation Cap
Using a Combination Cheshire / Sight tube Collimation tool
Reflections viewed through the sight tube of a Newtonian Reflector
Showing n reflections in the sight tube > secondary mirror1 > primary mirror2 > secondary mirror reflection3
Acknowledgement: I am indebted to Vic Meynard for his invaluable assistance in checking the accuracy of these images.