Consolidated reports in previous releases of Vault simply concatenated the same reports from each session together. One advantage of that style is that you can consolidate reports from slot and container based vaults, which you cannot do with the new style of consolidated report.
If you prefer the previous style of consolidated reports, use the vlteject command -report and -legacy options to consolidate the reports in that old style. If you currently do immediate reports, you have to change to deferred reports and either run the vlteject command manually or create a Vault policy to schedule the vlteject -report -legacy job. If you currently do deferred reports, you can add the -legacy option to the vlteject command you use to generate reports.