So... You have 2 different 12 word seed phrases? One from Android and one from your desktop right?
If so, you just restore the original one you had from Android with the 1+ BTC and you'll have access to the coins again.
If there is no "restore" option on Jaxx, you might need to clear the app data on Android so that Jaxx reverts to "newly installed" mode and should have a "pair/restore" option when you first run it.
Knowing the addresses doesn't help... But having the backup phrases certainly does!!
However, if you only have one backup phrase... Then you're probably out of luck, as it would appear you only have the backup phrase with the small amount... And not the backup phrase with the 1+ BTC
No, I only have one backup phrase. That is the one Jaxx supplied when I opened the original account, which was on the Android - that's where the 1+ BTC showed correctly.
Later, I downloaded the PC version of Jaxx, which did not show what was on the Android.
I did not try to pair the two until a month later, last Friday.
Why would the PC version cancel out the Android?
Also, I don't understand why knowing the addresses doesn't help?
If that's the case then what the F is so great about the blockchain? At least with my bank I can demonstrate though a paper trail that I transferred money from another account (like Coinbase) to my account at their bank. The money just doesn't disappear because of some procedural error in linking savings accounts. There is recourse.
And I have repeatedly reviewed their instructions to sync and I'm convinced that's what I followed. Is it unthinkable to suggest that their wallet may not be infallible?
Sorry for the rant! A loss like this may be nothing to some folks but this amount of money is serious business to me.