Google Console Confusion

Hi,
I am trying to use RankMath on a client site and connecting to the Google Console Account for the clients within my Google admin. When I installed RM and connected to the domain for the client on my Console account, the keywords in the WP/RM Search Analytics pulled into the display on WP were those keywords from another client in a totally different industry. At the moment I have all clients on my main Google Console Account but now wonder whether I should open a new Gmail account, and thus Console Account, for each and every client and not use my own Gmail as the Administrator for each of my client Console accounts?

Keywords
Clicks
Impressions
CTR
Position
semco semiconductor 0 1 0 28
quartz furnace 0 1 0 230
vertical furnaces 0 1 0 276
european semiconductor distributor 0 3 0 35
semiconductor purifiers 0 6 0 95.33
bulk gas purifiers 0 4 0 71.75
nupure corporation 0 1 0 20
firechek 0 1 0 40
semiconductor supplies 0 1 0 52
nupure 0 29 0 11.84
quartz tube for furnace 0 1 0 178
semco technologies 0 1 0 80