Someone cut the noodle at the Transformer???
Funny how far some jokers will go to be A@SES!!!
Nevertheless, everyone has given excellent descriptions of the odd voltage readings.
Whatever the loads (the connected equipment) are, resulted in an array of series connected stuff (unless loads are meant to be L-L / 240 VAC connected). The loads with higher Impedance resulted in a higher voltage across them.
Eventually everything worked out to be 150 VAC and 90 VAC to the center point.
If the PoCo's mid point ground bond was still connected at the Transformer, that would result in a slight trickle of current finding its way back to the Transformer via the Earth ground. This would probably raise the L-G voltage even higher than 150 VAC if there were less or lighter loads connected - or if voltage was checked with a Hi input Z meter, but who knows?!?!?!
Open Noodle situations really suck!