Hi jinoy
Kindly go as per FC, given details, he is correct.
Or let us know whats actual issue you are facing.
EWM IMG --> Master Data --> Activities Area --> Define Sort Sequence for Activity Area.
And sort the bin via sor tcode.
even though have fixed bin for decon you need to sort and then run the Business process.
Check storage type and activity area and activity combination.
Your reply can make use to resole your issue.
Check