Not at all uncommon for a first effort. Sounds like you've got it correct. Irrespective of belt installation markings, if all sprockets line up to their respective marks on the block/timing cover marks after a hand crank revolution then you're normally good to go. On 700/900 B230F/B234F with the rear camshaft mounted distributor, the intermediate shaft sprocket alignment doesn't matter as It only drives the oil pump, The exception is when you have a torn harmonic balancer pulley. In that case you need to verify the timing mark underneath the crank sprocket is lined up sighting in perpendicular with a mirror and/or confirm piston #1 is precisely TDC using a probe into the spark plug hole. Harmonic balancer failure can also be witnessed noting either screaming under acceleration or a variable alignment to the lower timing belt cover timing mark using a timing light or checking cyl #1 TDC.
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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now