Inconsistent data approval. Specific changes approved for some episodes - declined for others.

While updating crew member information for a long-running UK drama series, I realised that one crew member (a stage manager) was not listed on IMDB.  At least I could not find them, so I asked IMDB to create a listing for them.  I continued to add stage manager credits for this person. The name is Sandra Davidson

However, I have discovered that in later episodes this specific stage manager credit has been credited to someone with a similar name Sandy Davidson (I)(with an attribute credit as Sandra Davidson).  

Having looked up this person, it's clear that these are two separate people.  Sandy Davidson (I) is an American costume designer with some film credits, she also has a website where there is no mention of her ever working in the UK. Or spending over a decade working on a UK drama series.

I suspect that when the existing credits were added, as Sandra Davidson's listing did not exist, Sandy Davidson (I) was a close match.

I have corrected (successfully) some of these entries but now IMDB keep declining my corrections.

What do I do now?