I used 109 last night and it did the first dev fee at 1% but the second one it did 22.0877%.

[NOTICE ] 18/05/13 07:16:59 Shares: 1129 (A:99.65%, R:0.35%), Diff:0.612, 62.99MH/s, 124ms - OK
[NOTICE ] 18/05/13 07:17:08 Shares: 1130 (A:99.65%, R:0.35%), Diff:0.557, 62.99MH/s, 124ms - OK
[DEV    ] 18/05/13 09:58:34 Mining some dev fee 1.00501%
[DEV    ] 18/05/13 12:29:03 Done mining dev fee.
[DEV    ] 18/05/13 12:29:03 Ratio: 22.0877%
[INFO   ] 18/05/13 12:29:06 zealot/enemy-1.09a miner
[INFO   ] 18/05/13 12:29:06 NVIDIA CUDA 9.1
[INFO   ] 18/05/13 12:29:06 Dev fee is 1.0%
[NOTICE ] 18/05/13 12:29:06 MAIN POOL----------------------------------------------

It wasn't mining on my pool for 5+ hours.  Seems like it just paused from 7:17 until 9:58.  Then mined dev fee for 2 and a half hours.  I'd post screen grabs but I think I'm too new to post pics.