How is Current Maintenance Margin calculated by Interactive Brokers?

The reason that I asked about the $25k is that a Pattern Day Trader is allowed 25% margin intraday but must revert to 50% by the EOD for overnight margin.

Margin maintenance is also 25%. For some reason, Interactive Brokers displays both Current Maintenance Margin and Current Initial Margin at 25%. AFAIC, they should display the 50% overnight margin amount.