Every seed phrase has an indefinite quantity of accounts associated with it, even if you never use it.
But I didn’t know you created your second wallet only yesturday…
To make thing more clear, could you follow the MetaMask guide as I mentioned befor ?
How to recover your Secret Recovery Phrase – MetaMask (zendesk.com)
It will allow you to see if there is “Simple Key Pair” or not in your vault data. It will allow you to see if there is that mentioned anomaly with “jumping private key”.
It would be great also to analyse your seed phrases with Ian Coleman’s BIP39 Tool. It will allow you to see in which order the accounts are supposed to appear in your wallets.
So, there are 2 things you can verify for now.
By the way, this user stated he created more than 100 accounts to find his lost account… 
Keep me updated!