Taken the A from Parkside to St Ives today (Sat 11/04). It's unclear if the A or C are serving Orchard Park E & W 'wrong' way.
And even the signs in OP were unclear. There was a big poster that didn't say this, and then also some smaller posters that did. The A was serving the wrong way, the C was just going along King's Hedges Road. The electronic displays said there were no services at all.
All in all it was a better Saturday service than what we are used to; I took advantage of the direct link to the station and the lack of a huge gap in the early evening services :-)