I think i solved it!!

I think i solved it!!

i think its the pivot points! i tried taking the edges of the same side and connecting them and exporting into UDK (i put them in UDK because i thought it might of been how i was rotating and mirroring them in max)
i found that it fits perfectly with the ones i took it from and i think thats because the pivot point is there, i look the same block and moved it up to the second set and i ran into the same problem with it aligning on one side of the log but not on the second, i think this is because theres no pivot point to snap to.
To solve this i think i will export each set of logs from the corner piece out separately, with this the pivot points should be able to snap together no problem.
I was thinking of doing this but adding in the wall pieces and exporting that out as one object, i know ill have to create some pieces as a big wall however having all walls this was wouldn't be very efficient i think. hopefully this will work! Its been bugging me for the past 2 weeks, it was such a relief when my brain clicked onto the problem! (at least i hope its solved, shall find out soon!)