Has anyone else noticed that the GH4 produces duplicate file names on some of the video segments in successive SD cards?

For example I often shoot events where I fill an SD card, stop the recording, swap to a new SD card, format it in the camera and then start recording again. (I'm recording in 4K cinemalike-D mode.)

For example here is a path to the contents of one SD card:
E:\media\2014-06-25 AAG\Day-1\Reel-1\DCIM\102_PANA
and here is the directory listing in that folder:
P1020168.MOV
P1020169.MOV
P1020170.MOV
P1020171.MOV
P1020172.MOV
P1020173.MOV
P1020174.MOV

The path to the contents of the next SD card:
E:\media\2014-06-25 AAG\Day-1\Reel-2\DCIM\102_PANA
and it's contents:
P1020174.MOV
P1020175.MOV
P1020176.MOV
P1020177.MOV
P1020178.MOV
P1020179.MOV
P1020180.MOV
P1020181.MOV

Notice that file P1020174.MOV is the last file in the first SD and the first file in the second SD. I really prefer unique file names without regard to what folder they are in.

Since Adobe Premier Pro CC does not, on import, combine the clip segments in to a single clip like it does for other cameras, I discovered this file duplication problem when building full clips manually and got the files confused.

I tried Flow Motion 2 and some Driftwood series 6 settings, but I had the same problem with both of them. I did not go into quality tests yet, because I wanted to check workflow options first, with different fps settings in Flow Motion 2, without success, but also found out that spanning did not work with it and I wanted to get that right first. After some tests I found something strange happened. Instead of a range of MTS files spanning, I now get several files with the same content. The longer the clip gets, the more files there are, which makes me believe it creates a new copy of the original file every time it is supposed to span into a new clip due to the 4GB limitation. The files do have subtle differences in size, but are all around 4gigs, but I think it is only the variable bit rate. Here is some stream info example on 3 (of five) duplicate files.

\PRIVATE\AVCHD\BDMV\STREAM\00000.MTS Size = 4.305.033.216 Bytes (22.422.048 Packets) Stream: TS Max Speed = 96.897.200 bps Mode = 1080/24p Average PCR Timing Interval = 0,094 seconds Clip Duration = 0:08:06,02 PCR Duration = 0:08:06,10 Average Total Bitrate = 70.861.957 Average Video Bitrate = 69.022.876 Average Audio Bitrate = 235.013 Average Other Bitrate = 1.604.066 Max GOP Size = 4.662.528 Bytes (37.300.224 bits) Video Frame Count (All-I/P/B) = 11.653 - 971 / 2.914 / 7.767 Video Frame Size (Min/Ave/Max) = 12.288 / 367.482 / 1.031.232 I Frame Size (Min/Ave/Max) = 282.624 / 979.755 / 1.031.232 P Frame Size (Min/Ave/Max) = 87.552 / 463.923 / 504.384 B Frame Size (Min/Ave/Max) = 12.288 / 254.803 / 329.664

\PRIVATE\AVCHD\BDMV\STREAM\00001.MTS Size = 4.302.151.680 Bytes (22.407.040 Packets) Stream: TS Max Speed = 96.897.200 bps Mode = 1080/24p Average PCR Timing Interval = 0,094 seconds Clip Duration = 0:08:11,98 PCR Duration = 0:08:11,93 Average Total Bitrate = 69.956.059 Average Video Bitrate = 68.133.383 Average Audio Bitrate = 235.007 Average Other Bitrate = 1.587.668 Max GOP Size = 4.587.648 Bytes (36.701.184 bits) Video Frame Count (All-I/P/B) = 11.796 - 983 / 2.949 / 7.863 Video Frame Size (Min/Ave/Max) = 234.240 / 362.747 / 1.009.728 I Frame Size (Min/Ave/Max) = 945.216 / 967.698 / 1.009.728 P Frame Size (Min/Ave/Max) = 440.640 / 470.262 / 520.704 B Frame Size (Min/Ave/Max) = 234.240 / 246.841 / 264.192

\PRIVATE\AVCHD\BDMV\STREAM\00002.MTS Size = 4.301.021.184 Bytes (22.401.152 Packets) Stream: TS Max Speed = 96.897.200 bps Mode = 1080/24p Average PCR Timing Interval = 0,094 seconds Clip Duration = 0:08:14,99 PCR Duration = 0:08:14,87 Average Total Bitrate = 69.513.383 Average Video Bitrate = 67.701.911 Average Audio Bitrate = 234.995 Average Other Bitrate = 1.576.476 Max GOP Size = 4.569.792 Bytes (36.558.336 bits) Video Frame Count (All-I/P/B) = 11.868 - 989 / 2.967 / 7.911 Video Frame Size (Min/Ave/Max) = 234.432 / 360.450 / 991.488 I Frame Size (Min/Ave/Max) = 934.656 / 948.918 / 991.488 P Frame Size (Min/Ave/Max) = 457.344 / 471.075 / 510.720 B Frame Size (Min/Ave/Max) = 234.432 / 245.438 / 264.192

Even the clip duration seems vary, but inside premiere they are all the same length. Usually only one of the files retains any sound. I am deeply confused to what is happening, and would appreciate any insight any one might have. I will try some more settings and probably go back to stock too, just to check whether it happens there too.

One thing to note is the card I am using. I read some controversial and mostly unclear posts one which cards work or do not. I have been using a 64GB SanDisk Extreme the SDXC1 U1 Class 10 with 45MB/s. Even if, what some of the posts say, it would be only half as fast, it should still be able to keep up with the bps the tried settings use. The only other card I have to test at the moment is a 32GB Transcend Class 10, but that has only 10MB/s and is used usually for photography only. I am about to order the 64GB Extreme Pro 90MB/s but I still think the one I haver should be fine. I am not using the highest bit rates anyway...

Thanks for any knowledge you can share