Wanted to update my earlier reply.  Just called into the automated system and was increased from $4500 to $7500. Sam's Discover was increased from $1600 to $6600, automated system as well.

Amazing CL increase. How long have you got both card? How much you spent for month to get that credit limit?

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Starting Score: 10/14/2012 EQ702
Current Score: 11/09/2012 myfico EQ716 Discover Ex725 Walmart TU 716
Goal Score: 750

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I opened both cards in November 2011, only used each card once, last month.  And btw - Sam's increased me to $10,000.  Turned around and asked for an additional $3400.  I just had a baby this past September so the Sam's Discover will definitely be put to good use now.  I try to avoid Walmart (because of the lines) as much as possible.  But DH can get some use out of the card now that it's at a pretty decent limit.

Does a balance have to report for a cli?

-Rebuilding with Cap1 Secured: 300, CapOne Cash: $1k, NFCU Secured: 500, NFCU cashRewards $8.5K, NavCheck $2.5K, Wal-Mart: $1.1K, Sam's: $1.2K, Amazon: $1.5K, Apple Barclay: $3K, Haverty's: $1.5K, GE capital: $5K, Sears: $250(AU), PP MC:$1.5K, CareCredit:$3K

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Starting Score: 492-TU04, 480-EX FICO V2, 467-EQ Beacon 5 (Via Mortgage PreQual March '12)
Current Score: EX,EQ,TU (lender pull): 652, 659, 689, Walmart TU FICO: 691 (05/13)
Goal Score: 700
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Excellent question, i'm not sure. I do know that the increases came after i paid the balance(s) 2 weeks ago.