Is the distributer at back end of camshaft or front left side of engine? (my '90 is on camshaft)
If on camshaft, any error in cam timing will match dist. error.

step 1 - is the tensioner adjusted correctly to prevent belt jumping teeth?

step 2 - immediately on setting timing belt, does the cam look correctly aligned?
Timing marks on crankshaft sprocket are hard to see - check carefully.

Be sure there is mechanical connection between the shafts and sprockets, otherwise there are parts damaged or missing. Keyway on crankshaft indexes to drive sprocket and small roll pin in camshaft indexes to cam sprocket.

Spark timing is by computer, so misalignment of dist. will not affect it. Also you cannot rely on marks on harmonic balancer if the rubber has deteriorated.

Let us know how it goes...