my comments on Jim Martin on Stratification:
clause meanings are realised by system-structure relations cycling through grammatical ranks i.e. meanings are realised by relations between elements of structures in texts, instantiating relations between features in systems, at each rank within phonology, grammar and discourse... (no need to do it twice)
(1) clause meanings are realised by system-structure relations; meanings are realised by relations between elements of structures
This confuses the distinction between stratification and axis. In terms of stratification, meanings (semantics) are realised by wordings (lexicogrammar) — whatever the axis (paradigmatic or syntagmatic). In terms of axis, (paradigmatic) systems are realised by (syntagmatic) structures — whatever the stratum.
(2) meanings are realised by relations between elements of structures in texts
'In texts' refers only to the instance pole of the cline of instantiation. The realisation of meaning (semantics) in wording (lexicogrammar) applies to the whole cline, not just the instance. Hence: "stuck in the instance".