discrepancy on genomic annotation

[vswilliamson]

I have a variant located and annotated by my caller as CREBBP g.3781324_3781326del, c.5039_5041del, p.S1680del which when double-checked against your service returns CREBBP g.3781329_3781331del, c.5039_5041del, p.S1680del. The same variant checked against varsome provides a genomic start of chr6:3781324.

I was just curious as to the source of the discrepancy in the genomic positions. Is Transvar providing right alignment here instead of left?

Thanks in advance