This looks like a currency exchange rate issue since the problem is only with your € sessions. PokerTracker 4 converts those into your 'My Currency' (£), and the exchange rates for those sessions weren’t retrieved correctly, so ‘My C Won’ shows a loss. Your £ sessions don’t need converting, so they’re showing correctly:
Currency GuideTo fix your existing sessions:
Go to ‘Database > Currency’.
Select any sessions or tournaments with an exchange rate of -1. To select a range, click the first row, then hold Shift and click the last row. To select several rows one at a time, hold Ctrl and click each one.
Click ‘Set Rates’ to fetch the correct exchange rates.
This happens when the time zone isn’t set up correctly for iPoker. iPoker hand histories don’t say which time zone they’re in, so to stop it happening again:
In the iPoker lobby, click the arrow near the clock at the top left and select server time, not ‘Local’.
In PokerTracker 4, go to ‘Configure > Site & Import Options’, select the ‘Site Configuration’ tab and choose ‘iPoker Network’.
Set ‘iPoker Skin/Time Zone’ to any skin that uses the same server time zone. Then click ‘OK’.
This should prevent exchange rate problems in future sessions.