Time Zone Difference

Can anyone explain the Time Zone inconsistincy in Homeport when viewing Tides and Currents? When you click on the Tide or Current icon, a graph pops up showing the Tidal or Current plots, with a marker and call out showing the stage at the current time. In my case, that call out is showing GMT-3, while the "Date and Time" in the Heading below the graph shows the correct time for my time zone at GMT-4. I have tried all settings and the call out on the plot is always 1 hr later (+1) than the time zone used. (Note that I used a capital C for water current, vs. lower case to denote "existing".

Thanks for any tips,
Brian