As I checked in SAP 2016 for Lab cost that had been allocated to ECH (1A14100001) from MU14100001 in May.
I found that there are some cost were recorded via PO 4512601474 (WORLD TECH ENTERPRISE) by MED (QCD Planner and Instrument) and they were settled to MU14100001(with account 9105000000 - Maintenance SU) and allocated to ECH.
Anyway,those transactions had been cancelled in June that it should be absorbed (deduct) in allocation cost for June to ECH as well.
Please see below screen for reference.
Have you any comment to share krab?
Thank you.