Major love from Synchrony (Lowes)!

Since I got a Lowes card with an $800 limit about 6 months ago I had tried every few weeks for a CLI via the backdoor number and each time was denied.  I logged into Credit Karma this morning and saw that my TU score had FINALLY crept over 700 and my Equifax was at 716.  I called the backdoor number again and asked for $20K and they countered with $17K  I figured I'd go for broke and requested an increase online from Capital One as well.  My limit there is $10K but I'd like to get it higher since it's the only card I have besides Lowes.  We are looking to get a mortgage within the next 2-3 months so no new apps, just hitting up the soft pulls as much as I can.