Sweboz income

Hi

Not sure what is happening here but it just seems.....odd.

Still playing Sweboz, and after 4 or five turns the income just drops. From 13/1400 per turn to 900 in Leufana. No new units bought, no new family members, no spies I can see, caravan path bought turn 1/2 one turn from completion, trade rights established with the Boii.

Also when Luppae captured turn 6, still same unit levels, income still stays around 935 with extra 450 income from Luppae settlement..

Just doesn't see right.

Am I missing something?

Income is variable; farming varies by season and trade can vary depending on whether the routes are clear.