Multiple Tax Rate Calculation

Hello,

I’m trying to add a second tax charged on restaurants.
Tax 1, t1 = VAT at 16% of price excl. of tax
Tax 2, t2 = CL at 2% of price excl. of tax

When I set rate 1 as 16% and rate 2 as 2% the calculation seems off:
Product for 200 incl. tax
Amount w/out tax: 164
t1 @16%: 26.24
t2 @2%: 3.28
Total: 193.52

When I set rate 1 as 18% and rate 2 as 2% I get the correct figures:
Product for 200 incl. tax
Amount w/out tax: 169.49
t1 @16%: 27.12
t2 @2%: 3.39
Total: 200

Question is does Dolibarr calculate based on the 18% as rate 1? (16 + 2)