Larry in TN
En-Route
Then you can call another FSDO and get a different answer from another authoritative source.you could proactively call the FSDO and get the answer from an authoritative source.
If you're going to call anybody, call the DPE. He might be right, he might be wrong, but he knows what he'll accept and what he won't.
If you don't like the DPE's answer then you have to decide which is easier; changing the DPE's mind or getting an updated endorsement.
My opinion, which means absolutely nothing, is that you need to be able to show the solo endorsements under which all of your logged solo time was flown.