How many versions (blocks) of the MaxDiff experiment do you have? We recommend having many blocks in which case this issue goes away, the order of items varying from one block to the rest.
If you have just one block or very few blocks, then our designer tries to balance the order of items as best as possible so as to prevent position bias.
I believe you only have a problem if (1) you've imported your own design, (2) it has one or only a very few versions and (3) your design doesn't control for position effects. If that's the case I don't have a good solution for you, but perhaps someone else can offer one.