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Sounds just like my ebay laser collimator. Your laser collimator might need collimating.
Slip your laser collimator in the focuser tube but don't tighten and rotate it around. If the dot rotates in a big circle the laser itself is off.
I could never collimate my laser properly so I just rotate it around the circle it makes as center. Then I use a Cheshire eyepiece to align the main mirror.
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