Thanks Tampa!
I used the mov strategies you proposed and as long as my Boardship has no weapons, all is well!(with only one depl uranium cannon on my Boardship,the col ship will not be boarded )
Could it be a problem with targeting priorities? I realize that's reaching, but then again, it's kinda strange that the problem only occurs with colony ships.
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L++ Se+++ GdY $++ Fr C+++ Csc Sf Ai AuO M+ MpTM S Ss RRSHP+ Pw- Fq->Fq+ Nd+++ Rp G++ Mm++ Bb---