CRM Business Process Flow showing all stages issue

Hi All,

I am using CRM 2016 OL, i have a code onchange of the picklist which set the stage. My stages are:

Start --> stageA1 --> stageA2 --> stageA3 --> stageA4.   (one branch path)

Start --> stageB1 --> stageB2 --> stageB3                         (other branched path)

if my picklist value is 1 then i am moving my stage to stageA1 and if my picklist value is 2 then i am moving my stage to stageB1.

The problem here is, first time the stage is setting properly i.e start to stageA1 and if i again try to set the stage to stageB1 using picklist i am able to seeStart-> StageA1->StageB1 (additionalstageA1 is visible)

Two queries from my side:

1)  Is it OOB behavior

2)  Can we edit traverse path to set the path which we are suppose to get

Thanks & Regards

Vijji