Timescales can vary, from days to weeks depending on the history (number of previous interventions by DLM). The line must within the ES and re-sync 'green' threshold constantly, if there's a gap where a day ends up being 'amber' then it will just reset the time before DLM 'relaxes' the restrictions imposed I believe.
Interleaving is usually fairly easy to remove, banding often gets stuck though.