Why is the start position always shifted one base pair?

[Emma]

When I try to lift from hg38 to hg19 I get that the reference coordinates in hg38 are not exactly the same as my input, why is this?

So for example if I lift: 

chr1 898703 6229913

the result is:

chr1 834083 6289973 chr1:898704-6229913 1

Why is 898704 displayed and not 898703?

The end position seems to be the same though. 

Thanks for your help!

[Emma]

Never mind, I think it's giving the coordinates in "position box" format instead of BED format. 

[Emma]

Is there a reason why -preserveInput doesn't work with position box format? Is there a way to force it?